Account checks
An ACCOUNTCHECK request allows a card to be validated by checking the cardholder’s first line of address, the cardholder’s postcode and the security code, to ensure the details entered by the customer are valid. Click here to learn more about the checks performed.
Requirements
- Account checks are only available for certain acquiring banks. Before you begin, please contact our Support Team and ensure your acquiring bank supports this functionality.
- Account checks can only be performed for card-based payment methods.

Failure to submit these fields will result in a “60025” (Invalid request) error being returned in the response.
Update your payment form
You can update your payment form to instruct our JavaScript library to process an Account check prior to performing a standard transaction. This is done by specifying custom requestTypes, as shown in the example below:
<html> <head> </head> <body> <div id="st-notification-frame"></div> <form id="st-form" action="https://www.example.com" method="POST"> <div id="st-card-number" class="st-card-number"></div> <div id="st-expiration-date" class="st-expiration-date"></div> <div id="st-security-code" class="st-security-code"></div> <button type="submit" id="st-form__submit" class="st-form__submit"> Pay securely </button> </form> <script src=<DOMAIN>/js/v2/st.js></script> <script> (function() { var st = SecureTrading({ jwt: 'INSERT YOUR JWT HERE' }); st.Components({"requestTypes":["ACCOUNTCHECK","THREEDQUERY","AUTH"]}); })(); </script> </body> </html>
Replace <DOMAIN> with a supported domain. Click here for a full list.
Alternative Payment Methods (API)
Testing
Use the credentials provided on this page to test your solution.
When you sign up, you will be provided with a “live” account and a “test” account (the latter is prefixed with “test_”).
When testing, ensure requests submitted to Trust Payments reference your test sitereference.

Before you begin testing…
Please be aware of the following notes:
- Most fields submitted to our test system will be accepted. Any data breaching its defined specification will return an error message.
- Any test data that generates a successful response when submitted while a merchant is in test mode, will produce a declined response when a merchant is switched into live mode. In some cases, the test data may return an error response.
- Our test system attempts to simulate responses in a similar fashion to the live system. However, depending on your acquirer you may find some responses differ slightly from those given by the test system.
- In the interest of security, we recommend against using real payment details when using your test account.
- We recommend specifying the main amount “10.50” when testing. Other amounts can be used but may return unexpected responses.
- For those using Payment Pages, if you’re unsure where to start with your testing, you may find this resource helpful.
Test card details
The table below lists test card numbers and customer information that can be submitted to our test bank, along with the responses that should be expected in return.


- A baseamount of 70000 (£700.00) will always return a declined response from the test bank.
- A baseamount of 60010 (£600.10) will always return a bank system error from the test bank.
- Using baseamount 1050 (£10.50) will not generate an error.
3-D Secure v2
The following payment credentials can be used for testing 3-D Secure v2 (a form of SCA):
(3DSv2) Test Case 1: Successful Frictionless 3-D Secure Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001007 | THREEDQUERY Enrolled: Y Status: Y AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001002 | |
JCB | 3337000000000008 | |
MASTERCARD | 5200000000001005 | |
VISA (3-D Secure v2.1.0) | 4000000000001000 | |
VISA (3-D Secure v2.2.0) | 4000000000002701 |
(3DSv2) Test Case 2: Failed Frictionless 3-D Secure Authentication & Failed Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001015 | THREEDQUERY Enrolled: Y Status: N AUTH Error code: 60022 – Unauthenticated |
DINERS / DISCOVER | 6011000000001010 | |
JCB | 3337000000000990 | |
MASTERCARD | 5200000000001013 | |
VISA (3-D Secure v2.1.0) | 4000000000001018 | |
VISA (3-D Secure v2.2.0) | 4000000000002925 |
(3DSv2) Test Case 3: Attempts Stand-In Frictionless 3-D Secure Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001023 | THREEDQUERY Enrolled: Y Status: A AUTH Error code: 0 -Ok |
DINERS / DISCOVER | 6011000000001028 | |
JCB | 3337000000007045 | |
MASTERCARD | 5200000000001021 | |
VISA (3-D Secure v2.1.0) | 4000000000001026 | |
VISA (3-D Secure v2.2.0) | 4000000000002719 |
(3DSv2) Test Case 4: Unavailable Frictionless 3-D Secure Authentication from the Issuer & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001031 | THREEDQUERY Enrolled: Y Status: U AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001036 | |
JCB | 3337000000000735 | |
MASTERCARD | 5200000000001039 | |
VISA (3-D Secure v2.1.0) | 4000000000001034 | |
VISA (3-D Secure v2.2.0) | 4000000000002313 |
(3DSv2) Test Case 5: Rejected Frictionless 3-D Secure Authentication by the Issuer & Failed Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001049 | THREEDQUERY Enrolled: Y Status: R AUTH Error code: 60022 – Unauthenticated |
DINERS / DISCOVER | 6011000000001044 | |
JCB | 3337000000000321 | |
MASTERCARD | 5200000000001047 | |
VISA (3-D Secure v2.1.0) | 4000000000001042 | |
VISA (3-D Secure v2.2.0) | 4000000000002537 |
(3DSv2) Test Case 6: 3-D Secure Authentication Not Available on Lookup & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001056 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001051 | |
JCB | 3337000000006765 | |
MASTERCARD | 5200000000001054 | |
VISA (3-D Secure v2.1.0) | 4000000000001059 | |
VISA (3-D Secure v2.2.0) | 4000000000002990 |
(3DSv2) Test Case 7: Error on Lookup & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001064 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001069 | |
JCB | 3337000000000016 | |
MASTERCARD | 5200000000001062 | |
VISA (3-D Secure v2.1.0) | 4000000000001067 | |
VISA (3-D Secure v2.2.0) | 4000000000002446 |
(3DSv2) Test Case 8: Timeout on cmpi_lookup Transaction & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001072 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001077 | |
JCB | 3337000000000081 | |
MASTERCARD | 5200000000001070 | |
VISA (3-D Secure v2.1.0) | 4000000000001075 | |
VISA (3-D Secure v2.2.0) | 4000000000002354 |
(3DSv2) Test Case 9: Successful Step Up 3-D Secure Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001098 | THREEDQUERY Enrolled: Y Status: C AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001093 | |
JCB | 3337000000200004 | |
MASTERCARD | 5200000000001096 | |
VISA (3-D Secure v2.1.0) | 4000000000001091 | |
VISA (3-D Secure v2.2.0) | 4000000000002503 |
(3DSv2) Test Case 10: Failed Step Up 3-D Secure Authentication & No Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001106 | THREEDQUERY Enrolled: Y Status: C AUTH Not performed |
DINERS / DISCOVER | 6011000000001101 | |
JCB | 3337000000200087 | |
MASTERCARD | 5200000000001104 | |
VISA (3-D Secure v2.1.0) | 4000000000001109 | |
VISA (3-D Secure v2.2.0) | 4000000000002370 |
(3DSv2) Test Case 11: Step Up 3-D Secure Authentication is Unavailable & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001114 | THREEDQUERY Enrolled: Y Status: C AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001119 | |
JCB | 3337000000200079 | |
MASTERCARD | 5200000000001112 | |
VISA (3-D Secure v2.1.0) | 4000000000001117 | |
VISA (3-D Secure v2.2.0) | 4000000000002420 |
(3DSv2) Test Case 12: Error on 3-D Secure Authentication & No Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001122 | THREEDQUERY Enrolled: Y Status: C AUTH Not performed |
DINERS / DISCOVER | 6011000000001127 | |
JCB | 3337000000200046 | |
MASTERCARD | 5200000000001120 | |
VISA (3-D Secure v2.1.0) | 4000000000001125 | |
VISA (3-D Secure v2.2.0) | 4000000000002644 |
(3DSv2) Test Case 13: Bypassed 3-D Secure Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000001080 | THREEDQUERY Enrolled: B Status: None AUTH Error code: 0 – Ok |
DINERS / DISCOVER | 6011000000001085 | |
JCB | 3337000000000537 | |
MASTERCARD | 5200000000001088 | |
VISA (3-D Secure v2.1.0) | 4000000000001083 | |
VISA (3-D Secure v2.2.0) | 4000000000002560 |
3-D Secure v1
The following payment credentials can be used for testing 3-D Secure v1 (a form of SCA):
(3DSv1) Test Case 1: Successful 3-D Secure Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000003961 | THREEDQUERY Enrolled: Y Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000006246 | |
DISCOVER | 6011000000000004 | |
JCB | 3520000000000922 | |
MASTERCARD | 5200000000000007 | |
VISA | 4000000000000002 |
(3DSv1) Test Case 2: Failed Signature & No Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000006022 | THREEDQUERY Enrolled: Y Status: None AUTH Not performed |
DINERS | 3005000000004373 | |
DISCOVER | 6011000000000012 | |
JCB | 3520000000002811 | |
MASTERCARD | 5200000000000015 | |
VISA | 4000000000000010 |
(3DSv1) Test Case 3: Failed Authentication & No Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000000033 | THREEDQUERY Enrolled: Y Status: None AUTH Not performed |
DINERS | 3005000000005925 | |
DISCOVER | 6011000000000020 | |
JCB | 3520000000009931 | |
MASTERCARD | 5200000000000023 | |
VISA | 4000000000000028 |
(3DSv1) Test Case 4: Attempts/Non-Participating & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000003391 | THREEDQUERY Enrolled: Y Status: A AUTH Error code: 0 – Ok |
DINERS | 3005000000005271 | |
DISCOVER | 6011000000000038 | |
JCB | 3520000000004767 | |
MASTERCARD | 5200000000000908 | |
VISA | 4000000000000101 |
(3DSv1) Test Case 6: Not Enrolled & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000008135 | THREEDQUERY Enrolled: N Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000007269 | |
DISCOVER | 6011000000000053 | |
JCB | 3520000000006903 | |
MASTERCARD | 5200000000000056 | |
VISA | 4000000000000051 |
(3DSv1) Test Case 7: Unavailable & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000007780 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000006030 | |
DISCOVER | 6011000000000061 | |
JCB | 3520000000002423 | |
MASTERCARD | 5200000000000064 | |
VISA | 4000000000000069 |
(3DSv1) Test Case 8: Merchant Not Active & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000008416 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000004837 | |
DISCOVER | 6011000000000079 | |
JCB | 3520000000006549 | |
MASTERCARD | 5200000000000072 | |
VISA | 4000000000000077 |
(3DSv1) Test Case 9: cmpi_lookup error & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000006337 | THREEDQUERY Enrolled: U Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000009877 | |
DISCOVER | 6011000000000087 | |
JCB | 3520000000002175 | |
MASTERCARD | 5200000000000080 | |
VISA | 4000000000000085 |
(3DSv1) Test Case 10: cmpi_authenticate error & No Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000009299 | THREEDQUERY Enrolled: Y Status: None AUTH Not performed |
DINERS | 3005000000005602 | |
DISCOVER | 6011000000000095 | |
JCB | 3520000000006861 | |
MASTERCARD | 5200000000000098 | |
VISA | 4000000000000093 |
(3DSv1) Test Case 11: Authentication Unavailable & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340000000000116 | THREEDQUERY Enrolled: Y Status: None AUTH Error code: 0 – Ok |
DINERS | 3005000000007376 | |
DISCOVER | 6011000000000103 | |
JCB | 3520000000005780 | |
MASTERCARD | 5200000000000031 | |
VISA | 4000000000000036 |
(3DSv1) Test Case 12: Bypassed Authentication & Successful Authorisation |
||
Card type | PAN | Handling the response |
AMEX | 340099000000001 | THREEDQUERY Enrolled: B Status: None AUTH Error code: 0 – Ok |
DINERS | 3000990000000006 | |
DISCOVER | 6011990000000006 | |
JCB | 3500990000000001 | |
MASTERCARD | 5200990000000009 | |
VISA | 4000990000000004 |
3-D Secure status testing
To test for different 3-D Secure status values, follow the instructions displayed in the authentication prompt shown on the page (an example is shown below). In the textbox provided, you can enter different PIN values to test for different cases.

For Payment Pages:
With 3-D Secure enabled on your site reference, process a payment using one of the card numbers listed above and your browser will display an authentication prompt with instructions.
For JavaScript Library implementations:
After your payment form has been updated to reference our JavaScript library, process a payment using one of the card numbers listed above and your browser will display an authentication prompt with instructions.
For Mobile SDK implementations:
After your Android or iOS app has been updated to utilise our Mobile SDK, process a payment using one of the card numbers listed above and your app will display an authentication prompt with instructions.
The authentication prompt will only be displayed for non-frictionless test card details.
Frictionless cards will bypass authentication. In this case, the payment will be processed immediately (without being prompted by the browser for information).
Follow the instructions displayed within the authentication prompt to complete the payment:

Testing AVS and security code checks
If you haven’t already, please read our AVS and Security code documentation before testing:
Link to Payment Pages docs / Link to API docs
The following tables list test details that can be submitted to obtain different responses from the AVS and Security Code Checks. These details can be used with most major payment types.

Premise
Billing premise | Security response | Security response caption |
No 789 | 2 | Matched |
No 123 | 4 | Not Matched |
No 333 | 1 | Not Checked |
Leave blank | 0 | Not Given |
Postcode / ZIP code
Billing postcode | Security response | Security response caption | |
UK | US | ||
TE45 6ST | 55555 | 2 | Matched |
TE12 3ST | 12345 | 4 | Not Matched |
TE33 3ST | 33333 | 1 | Not Checked |
Leave blank | Leave blank | 0 | Not Given |
Security code
Security code | AMEX security code | Security response | Security response |
123 | 1234 | 2 | Matched |
214 | 2144 | 4 | Not Matched |
333 | 3333 | 1 | Not Checked |
Leave blank | Leave blank | 0 | Not Given |
Testing non-card payment methods

Link to Payment Pages docs / Link to Webservices API docs
Testing recurring payments
Testing for the acquirer advice code
When processing recurring payments, some acquirers may return an acquirer advice code in the response. The acquirer advice code is a numeric value used to indicate if further recurring payments can be processed for the given card.
Code | Description | Action |
0 | N/A | No action required |
1 | New account information available (Mastercard only) | Query customer for updated payment details |
2 | Cannot approve at this time | Try again later. If you are continuing to have difficulties, please contact your acquiring bank |
4 | Do not try again | Do not process further recurring transactions |
8 | Payment blocked by card scheme |
Where to find the acquirer advice code
- This code is returned in your daily subscription email report.
- It’s viewable within MyST by selecting the additional field to be displayed on the transaction search page. It can also be viewed on the single transaction view.
- Additionally, for those who have processed a recurring AUTH transaction using the API, the code is returned in the acquireradvicecode field in the response.
How to test for different acquirer advice codes
You can test that your system responds appropriately to different acquirer advice codes by processing transactions with the following attributes:
Visa | ||
Acquirer advice code returned | Card number | Base amount |
0 | 4111111111111111 | 1050 |
2 | 4000000000000671 | 1002 |
4 | 4000000000000671 | 1004 |
8 | 4000000000000671 | 1008 |

Mastercard | ||
Acquirer advice code returned | Card number | Base amount |
0 | 5100000000000511 | 1050 |
1 | 5100000000000271 | 1001 |
2 | 5100000000000271 | 1002 |
4 | 5100000000000271 | 1004 |
8 | 5100000000000271 | 1008 |
Testing Protect Plus
Please refer to the following resources when testing Protect Plus:
- Testing Protect Plus using Payment Pages
- Testing Protect Plus using JavaScript Library
- Testing Protect Plus using iOS SDK
Testing DCC
Please refer to the following resources when testing DCC:
Using Account Check to verify customer’s details
Follow these instructions when using Account Checks to verify the customer’s details prior to processing a payment.

Prerequisites

If you are unsure, please contact our Support Team for assistance.

To process an e-commerce Account Check that is authenticated with 3-D Secure, you will need to utilise our JavaScript Library instead of the solution described below. Click here to get started.
The following content should only be utilised by merchants processing Account Checks that are Mail or Telephone Order (MOTO), Merchant Initiated Transactions (MIT), or using other workflows that are exempt from the PSD2 mandate.

Failure to submit these fields will result in a “60025” (Invalid request) error being returned in the response. Click here for further information.

- Account checks are only available for certain acquiring banks. Before you begin, please contact our Support Team and ensure your acquiring bank supports this functionality.
- Account checks can only be performed for card-based payment methods.
Mandate considerations
Visa and Mastercard have mandated that you must obtain cardholder consent if storing card details for future use, and that these must be flagged at the time of the first authorisation, by submitting the credentialsonfile field in your requests. To do so, you will need to ensure the ACCOUNTCHECK request submitted includes the additional field credentialsonfile, with value set to “1”.
You must also flag any subsequent payments that are utilising previously-stored credentials, by including the credentialsonfile field in these requests with value set to “2”.
Click here to learn more about Credentials on File.
Checks performed
All Account Checks processed will perform checks on the cardholder’s first line of address, the cardholder’s postcode and the security code, to ensure the details entered by the customer are valid.
Click here to learn more about these checks.
Process overview
-
- Merchant submits ACCOUNTCHECK request.
- Trust Payments validates the request and contacts the bank.
- The acquiring bank will contact the card issuer to perform AVS and security code checks.
- Trust Payments receives results of the request and passes this back to the merchant.
- Merchant receives and interprets this response.

The customer’s account is not debited when an ACCOUNTCHECK request is performed.

ACCOUNTCHECK request
The fields required in an ACCOUNTCHECK request are the same as a standard AUTH request, except with the following differences:
- The baseamount can be “0”. A non-zero amount can be submitted – this will be inherited in any subsequent requests that reference this Account check as its parent, unless overridden with a new amount.
- Additional field credentialsonfile must be submitted with value “1”. (See below)
Field specification
Field | Format | Description | |
![]() |
credentialsonfile XPath: /operation/credentialsonfile |
Numeric (1) | This must be set to “1”, to indicate the customer agreed for the payment credentials to be stored for future transactions. See below for further information. |
You can submit any field that you can submit in an AUTH request and these will be inherited by any subsequent child requests. Click here to learn more.
The following is an example of an ACCOUNTCHECK request:
#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) accountcheck= { "currencyiso3a": "GBP", "requesttypedescriptions": ["ACCOUNTCHECK"], "sitereference": "test_site12345", "baseamount": "0", "orderreference": "My_Order_123", "accounttypedescription": "MOTO", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123", "billingpremise": "789", "billingpostcode": "TE45 6ST", "credentialsonfile": "1" } strequest = securetrading.Request() strequest.update(accountcheck) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'currencyiso3a' => 'GBP', 'requesttypedescriptions' => array('ACCOUNTCHECK'), 'sitereference' => 'test_site12345', 'baseamount' => '0', 'orderreference' => 'My_Order_123', 'accounttypedescription' => 'MOTO', 'pan' => '4111111111111111', 'expirydate' => '12/2020', 'securitycode' => '123', 'billingpremise' => '789', 'billingpostcode' => 'TE45 6ST', 'credentialsonfile' => '1' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ <DOMAIN>/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "currencyiso3a": "GBP", "requesttypedescriptions": ["ACCOUNTCHECK"], "sitereference": "test_site12345", "baseamount": "0", "orderreference": "My_Order_123", "accounttypedescription": "MOTO", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123", "billingpremise": "789", "billingpostcode": "TE45 6ST", "credentialsonfile": "1" }]}'
{"alias":"[email protected]","version":"1.00","request":[{"currencyiso3a":"GBP","requesttypedescriptions":["ACCOUNTCHECK"],"sitereference":"test_site12345","baseamount":"0","orderreference":"My_Order_123","accounttypedescription":"MOTO","pan":"4111111111111111","expirydate":"12\/2020","securitycode":"123","billingpremise":"789","billingpostcode":"TE45 6ST","credentialsonfile":"1"}]}
<?xml version='1.0' encoding='utf-8'?> <requestblock version="3.67"> <alias>[email protected]</alias> <request type="ACCOUNTCHECK"> <merchant> <orderreference>My_Order_123</orderreference> </merchant> <billing> <amount currencycode="GBP">0</amount> <postcode>TE45 6ST</postcode> <premise>789</premise> <payment> <pan>4111111111111111</pan> <securitycode>123</securitycode> <expirydate>12/2020</expirydate> </payment> </billing> <operation> <accounttypedescription>MOTO</accounttypedescription> <sitereference>test_site12345</sitereference> <credentialsonfile>1</credentialsonfile> </operation> </request> </requestblock>
Replace <DOMAIN> with a supported domain. Click here for a full list.
ACCOUNTCHECK response
After the request has been processed, you will receive a single response that contains the response to the ACCOUNTCHECK request:
{ u 'requestreference': u 'Ar2xj1hjr', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-07 16:12:00', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-07', u 'errorcode': u '0', u 'orderreference': u 'My_Order_123', u 'tid': u '27882788', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'transactionreference': u '23-9-80023', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'baseamount': u '0', u 'accounttypedescription': u 'MOTO', u 'acquirerresponsecode': u '00', u 'requesttypedescription': u 'ACCOUNTCHECK', u 'securityresponsesecuritycode': u '2', u 'currencyiso3a': u 'GBP', u 'authcode': u 'TEST46', u 'errormessage': u 'Ok', u 'operatorname': u '[email protected]', u 'securityresponsepostcode': u '2', u 'maskedpan': u '411111######1111', u 'securityresponseaddress': u '2', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '0', u 'credentialsonfile': u '1' }] }
array(3) { ["requestreference"] => string(9) "A4cenptwx" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(28) { ["transactionstartedtimestamp"] => string(19) "2016-12-09 11:04:29" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-09" ["errorcode"] => string(1) "0" ["baseamount"] => string(1) "0" ["tid"] => string(8) "27882788" ["merchantnumber"] => string(8) "00000000" ["securityresponsepostcode"] => string(1) "2" ["transactionreference"] => string(10) "72-9-80018" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["orderreference"] => string(12) "My_Order_123" ["accounttypedescription"] => string(4) "MOTO" ["acquirerresponsecode"] => string(2) "00" ["requesttypedescription"] => string(12) "ACCOUNTCHECK" ["securityresponsesecuritycode"] => string(1)"2" ["currencyiso3a"] => string(3) "GBP" ["authcode"] => string(6) "TEST39" ["errormessage"] => string(2) "Ok" ["operatorname"] => string(23) "[email protected]" ["merchantcountryiso2a"] => string(2) "GB" ["maskedpan"] => string(16) "411111######1111" ["securityresponseaddress"] => string(1) "2" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "0" ["credentialsonfile"] => string(1) "1" } } }
{"requestreference":"W23-q3wa45ge","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 16:16:39","livestatus":"0","issuer":"SecureTrading Test Issuer1","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","baseamount":"0","tid":"27882788","merchantnumber":"00000000","securityresponsepostcode":"2","transactionreference":"23-9-80024","merchantname":"Test Merchant","paymenttypedescription":"VISA","orderreference":"My_Order_123","accounttypedescription":"MOTO","acquirerresponsecode":"00","requesttypedescription":"ACCOUNTCHECK","securityresponsesecuritycode":"2","currencyiso3a":"GBP","authcode":"TEST53","errormessage":"Ok","operatorname":"[email protected]","merchantcountryiso2a":"GB","maskedpan":"411111######1111","securityresponseaddress":"2","issuercountryiso2a":"US","settlestatus":"0","credentialsonfile":"1"}],"secrand":"NunVEQ"}
<?xml version='1.0' encoding='utf-8'?> <responseblock version="3.67"> <requestreference>X575647667</requestreference> <response type="ACCOUNTCHECK"> <merchant> <merchantname>Test Merchant</merchantname> <orderreference>My_Order_123</orderreference> <tid>27882788</tid> <merchantnumber>00000000</merchantnumber> <merchantcountryiso2a>GB</merchantcountryiso2a> <operatorname>[email protected]</operatorname> </merchant> <transactionreference>16-9-1</transactionreference> <billing> <amount currencycode="GBP">0</amount> <payment type="VISA"> <issuer>SecureTrading Test Issuer1</issuer> <issuercountry>US</issuercountry> <pan>411111######1111</pan> </payment> <dcc enabled="0"/> </billing> <authcode>TEST53</authcode> <live>0</live> <error> <message>Ok</message> <code>0</code> </error> <timestamp>2013-01-16 10:48:17</timestamp> <acquirerresponsecode>00</acquirerresponsecode> <security> <address>2</address> <postcode>2</postcode> <securitycode>2</securitycode> </security> <settlement> <settleduedate>2013-01-16</settleduedate> <settlestatus>0</settlestatus> </settlement> <operation> <accounttypedescription>MOTO</accounttypedescription> <credentialsonfile>1</credentialsonfile> </operation> </response> <secrand>bByuPvGz9Hcm</secrand> </responseblock>
Handling the response
- Ensure that the errorcode value returned is “0”, indicating success. (You must not store credentials if an error has occurred)
- Check the values returned in the securityresponseaddress, securityresponsepostcode and securityresponsesecuritycode fields and only proceed if business requirements have been satisfied. (More info provided below)

Field | Format | Description | |
![]() |
securityresponseaddress XPath: /security/address |
Numeric (1) | “0” Not given – Your system did not provide the acquiring bank the information required to perform this check.
“1” Not checked – The acquiring bank did not perform this check on the information you provided in the request. “2” Matched – The information you provided in the request matches the information obtained by the acquiring bank, from the customer’s payment issuer. “4” Not matched – The information you provided in the request does not match the information obtained by the acquiring bank, from the customer’s payment issuer. |
![]() |
securityresponsepostcode XPath: /security/postcode |
Numeric (1) | |
![]() |
securityresponsesecuritycode XPath: /security/securitycode |
Numeric (1) |
Payouts

If you are unsure, please contact our Support Team for assistance.
Payouts are similar to standard refunds, except they can be performed independently of other transactions. The benefits of performing payouts include:
- The refund amount can be greater than the original payment, if required.
- The refund can be processed before the original payment has been settled into your bank account.


Requirements
You will need to have a CFT Merchant Number associated with your Trust Payments account. If you are unsure if your merchant number supports this, we recommend contacting your bank for clarification. Additionally, please ensure you are following any guidelines outlined by your bank before proceeding.
Payout request
Using parent transaction
- Payouts are performed by processing a REFUND request.
- Like a standard REFUND request, the requesttypedescriptions needs to be “REFUND”.
- The accounttypedescription submitted needs to be “CFT”.
- In this example, the parenttransactionreference is included, which references the original AUTH. This will inherit the payment, billing and customer details from the parent, so your system does not need to submit them again.
The following is an example of such a request:

#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) payout= { "requesttypedescriptions": ["REFUND"], "sitereference": "test_site12345", "accounttypedescription": "CFT", "parenttransactionreference": "1-2-345678" } strequest = securetrading.Request() strequest.update(payout) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'requesttypedescriptions' => array('REFUND'), 'sitereference' => 'test_site12345', 'accounttypedescription' => 'CFT', 'parenttransactionreference' => '1-2-345678' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ <DOMAIN>/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "requesttypedescriptions": ["REFUND"], "sitereference": "test_site12345", "accounttypedescription": "CFT", "parenttransactionreference": "1-2-345678" }]}'
{"alias":"[email protected]","version":"1.00","request":[{"requesttypedescriptions":["REFUND"],"sitereference":"test_site12345","accounttypedescription":"CFT","parenttransactionreference":"1-2-345678"}]}
<requestblock version="3.67"> <alias>[email protected]</alias> <request type="REFUND"> <operation> <sitereference>test_site12345</sitereference> <accounttypedescription>CFT</accounttypedescription> <parenttransactionreference>1-2-345678</parenttransactionreference> </operation> </request> </requestblock>
Replace <DOMAIN> with a supported domain. Click here for a full list.
Without parent
As an alternative to the above, you can also submit a payout request without reference to a parent transaction. In this scenario, you will instead need to submit the customer’s payment details in the payout request. Please see the following example:
#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) payout= { "requesttypedescriptions": ["REFUND"], "sitereference": "test_site12345", "accounttypedescription": "CFT", "baseamount": "1050", "currencyiso3a": "GBP", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123" } strequest = securetrading.Request() strequest.update(payout) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'requesttypedescriptions' => array('REFUND'), 'sitereference' => 'test_site12345', 'accounttypedescription' => 'CFT', 'baseamount' => '1050', 'currencyiso3a' => 'GBP', 'pan' => '4111111111111111', 'expirydate' => '12/2020', 'securitycode' => '123' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ <DOMAIN>/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "requesttypedescriptions": ["REFUND"], "sitereference": "test_site12345", "accounttypedescription": "CFT", "baseamount": "1050", "currencyiso3a": "GBP", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123" }]}'
{"alias":"[email protected]","version":"1.00","request":[{"requesttypedescriptions":["REFUND"],"sitereference":"test_site12345","accounttypedescription":"CFT","baseamount":"1050","currencyiso3a":"GBP","pan":"4111111111111111","expirydate":"12\/2020","securitycode":"123"}]}
<requestblock version="3.67"> <alias>[email protected]</alias> <request type="REFUND"> <billing> <payment> <expirydate>12/2020</expirydate> <pan>4111111111111111</pan> <securitycode>123</securitycode> </payment> <amount currencycode="GBP">1050</amount> </billing> <operation> <sitereference>test_site12345</sitereference> <accounttypedescription>CFT</accounttypedescription> </operation> </request> </requestblock>
Replace <DOMAIN> with a supported domain. Click here for a full list.
Field specification

Field | Format | Description | |
![]() |
accounttypedescription XPath: /operation/accounttypedescription |
Alpha (20) | Must be “CFT”. |
![]() |
baseamount XPath: /billing/amount |
Numeric (13) | The refund amount in base units, with no commas or decimal points. e.g. £10.99 would be submitted as “1099” but ¥246 would be submitted as “246”.
(Max length of amount may vary depending on your acquiring bank – Contact your bank for further info) |
![]() |
currencyiso3a XPath: /billing/amount/@currencycode |
Alpha (3) | The currency that the transaction will be processed in. |
![]() |
expirydate XPath: /billing/payment/expirydate |
Date MM/YYYY | If you would like to process a refund with an updated expiry date, the new value is submitted in this field. |
![]() |
orderreference XPath: /merchant/orderreference |
Alphanumeric including symbols (255) |
Your unique order reference that can be stored on Trust Payments’s system.
If this is not submitted, it is inherited from the parent AUTH request, provided a parenttransactionreference has been included. |
![]() |
pan XPath: /billing/payment/pan |
Numeric (12-19) | This is the long number printed on the front of the customer’s card.
We return a masked version of this PAN in the response, in the field maskedpan. e.g. “411111######1111” |
![]() |
parenttransactionreference XPath: /operation/parenttransactionreference |
Alphanumeric & hyphens (25) |
You can submit the transaction reference of the AUTH request that you would like to refund. |
![]() |
requesttypedescriptions XPath: /@type |
Alphanumeric & hyphens (25) |
The request type required is “REFUND”. |
![]() |
securitycode XPath: /security/securitycode |
Numeric (3-4) | This is the three digit security code printed on the back of the card.
(For AMEX cards, this is a 4 digit code found on the front of the card) We strongly recommend submitting this value for the processing of security code checks. Additionally, some banks may decline the payment if the security code is not present. |
![]() |
sitereference XPath: /operation/sitereference |
Alphanumeric & underscore (50) |
A unique reference that identifies your account. You receive this when you first sign up with us. |
Payout response
The response returned has the same structure as a standard REFUND, except that the accounttypedescription returned is “CFT”:
{ u 'requestreference': u 'Agv3epv31', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-07 15:44:33', u 'parenttransactionreference': u '1-2-345678', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-07', u 'errorcode': u '0', u 'orderreference': u 'My_Order_123', u 'tid': u '27880001', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'transactionreference': u '1-2-345679', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'baseamount': u '1050', u 'accounttypedescription': u 'CFT', u 'acquirerresponsecode': u '00', u 'requesttypedescription': u 'REFUND', u 'securityresponsesecuritycode': u '0', u 'currencyiso3a': u 'GBP', u 'authcode': u 'TEST REFUND ACCEPTED', u 'errormessage': u 'Ok', u 'operatorname': u '[email protected]', u 'securityresponsepostcode': u '0', u 'maskedpan': u '411111######1111', u 'securityresponseaddress': u '0', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '0' }] }
array(3) { ["requestreference"] => string(9) "A19beknpr" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(28) { ["transactionstartedtimestamp"] => string(19) "2016-12-09 10:21:13" ["parenttransactionreference"] => string(10) "1-2-345678" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-09" ["errorcode"] => string(1) "0" ["orderreference"] => string(12) "My_Order_123" ["tid"] => string(8) "27880001" ["merchantnumber"] => string(8) "00000000" ["securityresponsepostcode"] => string(1) "0" ["transactionreference"] => string(10) "1-2-345679" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["baseamount"] => string(4) "1050" ["accounttypedescription"] => string(3) "CFT" ["acquirerresponsecode"] => string(2) "00" ["requesttypedescription"] => string(6) "REFUND" ["securityresponsesecuritycode"] => string(1) "0" ["currencyiso3a"] => string(3) "GBP" ["authcode"] => string(20) "TEST REFUND ACCEPTED" ["errormessage"] => string(2) "Ok" ["operatorname"] => string(23) "[email protected]" ["merchantcountryiso2a"] => string(2) "GB" ["maskedpan"] => string(16) "411111######1111" ["securityresponseaddress"] => string(1) "0" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "0" } } }
{"requestreference":"W23-qc7t4h8a","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 15:50:37","parenttransactionreference":"1-2-345678","livestatus":"0","issuer":"SecureTrading Test Issuer1","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","baseamount":"1050","tid":"27880001","merchantnumber":"00000000","merchantcountryiso2a":"GB","transactionreference":"1-2-345679","merchantname":"Test Merchant","paymenttypedescription":"VISA","orderreference":"My_Order_123","accounttypedescription":"CFT","acquirerresponsecode":"00","requesttypedescription":"REFUND","securityresponsesecuritycode":"0","currencyiso3a":"GBP","authcode":"TEST REFUND ACCEPTED","errormessage":"Ok","operatorname":"[email protected]","securityresponsepostcode":"0","maskedpan":"411111######1111","securityresponseaddress":"0","issuercountryiso2a":"US","settlestatus":"0"}],"secrand":"0V2j6j0kl2R1UU"}
<?xml version='1.0' encoding='utf-8'?> <responseblock version="3.67"> <requestreference>X1u3u92dg</requestreference> <response type="REFUND"> <merchant> <tid>27880001</tid> <merchantnumber>00000000</merchantnumber> <merchantcountryiso2a>GB</merchantcountryiso2a> <merchantname>Test Merchant</merchantname> <orderreference>My_Order_123</orderreference> <operatorname>[email protected]</operatorname> </merchant> <transactionreference>1-2-345679</transactionreference> <billing> <amount currencycode="GBP">1050</amount> <payment type="VISA"> <pan>411111######1111</pan> <issuercountry>US</issuercountry> <issuer>SecureTrading Test Issuer1</issuer> </payment> <dcc enabled="0"/> </billing> <timestamp>2019-12-17 11:16:05</timestamp> <error> <message>Ok</message> <code>0</code> </error> <acquirerresponsecode>00</acquirerresponsecode> <live>0</live> <authcode>TEST REFUND ACCEPTED</authcode> <operation> <parenttransactionreference>1-2-345678</parenttransactionreference> <accounttypedescription>CFT</accounttypedescription> </operation> <settlement> <settleduedate>2019-12-17</settleduedate> <settlestatus>0</settlestatus> </settlement> <security> <address>0</address> <postcode>0</postcode> <securitycode>0</securitycode> </security> </response> <secrand>V1utOQ5A</secrand> </responseblock>
3-D Secure (version 1)

If you are unsure, please contact our Support Team for assistance.
The following documentation explains how to manually perform 3-D Secure using version 1 through our Webservices API.
The process described below only supports 3-D Secure version 1.
We recommend all merchants utilise 3-D Secure version 2 by using our JavaScript Library.
If you are already processing e-commerce payments using our JavaScript Library, you do not need to follow the process described below, as the JavaScript Library will handle the 3-D Secure process automatically.
3-D Secure is a protocol designed to reduce fraud and chargebacks during e-commerce transactions. It allows Mastercard and Visa card issuers to provide an extra level of protection, by authenticating the customer’s identity at the point of sale, sometimes by prompting for a previously-agreed PIN and/or password.

Process overview

- Your system will need to send a THREEDQUERY request using our Webservices API (including the customer’s card details) and interpret the response returned.
- Trust Payments will check whether the customer’s card is enrolled in 3-D Secure.

If the customer is enrolled in 3-D Secure, your system will need to redirect the customer to the card issuer’s server (ACS URL) and handle the customer being redirected to your server (Term URL).

Your system will need to send an AUTH request using our Webservices API and interpret the response returned.
1. Check customer enrolment
To determine whether or not the customer’s card is enrolled in the 3-D Secure scheme, you need to manually submit a THREEDQUERY request using our Webservices API.
THREEDQUERY Request
The following example demonstrates how to structure a THREEDQUERY request:
#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) threedquery= { "termurl":"https://termurl.com", "accept":"text/html,*/*", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123", "currencyiso3a":"GBP", "requesttypedescriptions": ["THREEDQUERY"], "accounttypedescription":"ECOM", "sitereference": "test_site12345", "baseamount": "1050" } strequest = securetrading.Request() strequest.update(threedquery) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'termurl' => 'https://termurl.com', 'accept' => 'text/html,*/*', 'pan' => '4111111111111111', 'expirydate' => '12/2020', 'securitycode' => '123', 'currencyiso3a' => 'GBP', 'requesttypedescriptions' => array('THREEDQUERY'), 'accounttypedescription' => 'ECOM', 'sitereference' => 'test_site12345', 'baseamount' => '1050' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ https://webservices.securetrading.net/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "termurl":"https://termurl.com", "accept":"text/html,*/*", "pan": "4111111111111111", "expirydate": "12/2020", "securitycode": "123", "currencyiso3a":"GBP", "requesttypedescriptions": ["THREEDQUERY"], "accounttypedescription":"ECOM", "sitereference": "test_site12345", "baseamount": "1050" }]}'
Here is the specification of the fields included in the THREEDQUERY request described above:

Key
Field name | Type | Length | Request | Description |
accept | Alphanumeric | 1024 | ![]() |
The exact content of the HTTP accept-header field as received from the cardholder’s user agent. |
accounttypedescription | Alpha | 20 | ![]() |
This must be submitted as “ECOM” (e-commerce). |
baseamount | Numeric | 13 | ![]() |
The amount of the transaction in base units, with no commas or decimal points, so £10 is submitted as 1000. This value must be greater than zero. (Max length may vary depending on your acquiring bank – Contact your bank for further info) |
currencyiso3a | Alpha | 3 | ![]() |
The currency that the transaction will be processed in. |
expirydate | Date MM/YYYY | 7 | ![]() |
The expiration date printed on the card. |
pan |
Numeric | 12-19 | ![]() |
This is the long number printed on the front of the customer’s card.
We return a masked version of this PAN in the response, in the field maskedpan. e.g. “411111######1111” |
requesttypedescriptions | Alpha | 20 | ![]() |
The request type required is “THREEDQUERY”. |
securitycode |
Numeric | 3-4 | ![]() |
This is the three digit security code printed on the back of the card. (For AMEX cards, this is a 4 digit code found on the front of the card)This field is not strictly required field by Trust Payments, but it is highly recommended for the processing of security code checks.Additionally, some banks may decline the payment if the security code is not present. |
sitereference | Alphanumeric including underscore |
50 | ![]() |
The site reference relates to your individual account which you received on setup. If you do not know your site reference, please contact our Support team. |
termurl | URL | 1024
More info |
![]() |
This field value is a URL of a script/file located on your system that is able to manage customers who are returned to your system. It is used to instruct the card issuer where to send the customer’s browser after they have been authenticated on the card issuer’s ACS. |
useragent | Alphanumeric | 255 | ![]() |
The exact content of the HTTP user-agent header field as received from the cardholder’s user agent. We strongly recommend you submit this field, as failure to do so may forfeit the liability shift. |
THREEDQUERY Response
This section documents how to interpret a THREEDQUERY response, which is used to indicate whether or not the customer’s card is enrolled in the card issuer’s 3-D Secure scheme.

The example below demonstrates the structure of a THREEDQUERY response, indicating that the customer’s card is enrolled in a 3-D Secure scheme:
{ u 'requestreference': u 'Aw5mpjtv6', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-07 16:55:47', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'xid': u 'amh1OCtINGpuemJaVmQreU5YT2Y=', u 'pareq': u 'eJxVUmFPw9C12xiQowlCopiIqGji5Yqj25lPCwOutoQKHZzxqOQgF5soqzk=', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-07', u 'errorcode': u '0', u 'threedversion': u '1.0.2', u 'tid': u '27882788', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'transactionreference': u '1-2-345678', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'acsurl': u 'https://webapp.securetrading.net/acs/visa.cgi', u 'accounttypedescription': u 'ECOM', u 'requesttypedescription': u 'THREEDQUERY', u 'md': u 'UEZOVVBqeE5SRDQ4VFVSSVBucE9abUp5WWtTlDR0NLaFVSZUV5aStFPQ==', u 'maskedpan': u '411111######0211', u 'errormessage': u 'Ok', u 'operatorname': u '[email protected]', u 'enrolled': u 'Y', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '0' }] }
array(3) { ["requestreference"] => string(9) "A2cjnruwy" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(25) { ["transactionstartedtimestamp"] => string(19) "2016-12-09 11:25:36" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["xid"] => string(28) "ZlcyU1hQcUhmaEtzd2I1SmkrMnM=" ["pareq"] => string(27) "eJxVUstuwjAQ/BXEHZxjoOrXA==" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-09" ["errorcode"] => string(1) "0" ["threedversion"] => string(5) "1.0.2" ["tid"] => string(8) 27882788" ["merchantnumber"] => string(8) "00000000" ["merchantcountryiso2a"] => string(2) "GB" ["transactionreference"] => string(10) "1-2-345678" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["acsurl"] => string(45) "https://webapp.securetrading.net/acs/visa.cgi" ["accounttypedescription"] => string(4) "ECOM" ["requesttypedescription"] => string(11) "THREEDQUERY" ["md"] => string(72) "UEZOVVBqeVQand2VTFRKzptZGY2RXZXOGQrS2V5Tko5cEk9" ["maskedpan"] => string(16) "411111######0211" ["errormessage"] => string(2) "Ok" ["operatorname"] => string(23) "[email protected]" ["enrolled"] => string(1) "Y" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "0" } } }
{"requestreference":"W23-08yvq0db","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 16:57:44","livestatus":"0","issuer":"SecureTrading Test Issuer1","xid":"KzRLRmhSUEZ0OWZJSkJIMDU1dDk=","pareq":"eJxVUu9PwjAQ\/NtY9ts6tP8Ac1Rqq+","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","threedversion":"1.0.2","tid":"27882788","merchantnumber":"00000000","merchantcountryiso2a":"GB","transactionreference":"1-2-345678","merchantname":"Test Merchant","paymenttypedescription":"VISA","acsurl":"https:\/\/webapp.securetrading.net\/acs\/visa.cgi","accounttypedescription":"ECOM","requesttypedescription":"THREEDQUERY","md":"UEZOVVBqeE5SRD06bWRzS1dBbnFZY01JRjEwZGOWhrPQ==","maskedpan":"411111######0211","errormessage":"Ok","operatorname":"[email protected]","enrolled":"Y","issuercountryiso2a":"US","settlestatus":"0"}],"secrand":"0gqEPDTnCWlvTr6G"}

Check the error code field value
If the errorcode value returned in the response is not ‘0’, an error has occurred. If an errorcode other than ‘0’ is returned, please consult the table below and attempt to resolve the issue:
Error code | Description |
0 | Request was successful. |
30000 | Invalid field. |
60031 | The THREEDQUERY request used a payment type that is not supported by Trust Payments 3-D Secure. |
other | Other errors will require further investigation. Click here for a full list of possible error codes. |
If you were unable to resolve the issue, you can instruct your system to perform a standard AUTH without using 3-D Secure.
Check the enrolled field value
If the enrolled value returned in the response is “Y”, the customer’s card is enrolled in 3-D secure. Please refer to the following table for enrolled values:
Enrolled | Description | Action |
Y | The card is enrolled in the card issuer’s 3-D Secure scheme. | Send the customer to the card issuer’s Access Control Server (ACS). The URL for the ACS is provided in the acsurl of the THREEDQUERY response. |
N | The card is not enrolled in the card issuer’s 3-D Secure scheme. | Perform an AUTH Request, including the transactionreference returned in the THREEDQUERY response (example can be found below). |
U | The card’s enrolment in the card issuer’s 3-D Secure scheme could not be determined. | This typically indicates a temporary problem with the card issuer’s systems. You can configure your system to resubmit the same THREEDQUERY request. If this continues to fail, submit a standard AUTH request using our Webservices API, including the transactionreference returned in the THREEDQUERY response. |
Here is the specification of the fields included in the THREEDQUERY response described above:
Key
Field name | Type | Length | Response | Description |
requesttypedescription | Alpha | 20 | ![]() |
“THREEDQUERY” is always returned in the response. |
xid | Alphanumeric | 255 | ![]() |
The unique identifier for the transaction, assigned by the MPI (Merchant Plug-In) (in this case, Trust Payments). |
enrolled | Char | 1 | ![]() |
Determines if the cardholder is enrolled in a 3-D Secure scheme.
|
pareq | Alphanumeric including symbols | 2048 | ![]() |
The unique identifier for the transaction, assigned by the MPI (Merchant Plug-In) (in this case, Trust Payments). |
md | Alphanumeric including symbols | 1024 | ![]() |
Returned if card is enrolled.
The unique 3-D Secure reference for this transaction. |
acsurl | URL | 1024 | ![]() |
Returned if card is enrolled.
The URL of the Access Control Server (ACS) to be used in authenticating the cardholder. |
threedversion | Numeric | 6 | ![]() |
Only returned for accounts with certain acquiring banks.
The version of the 3-D Secure protocol. |
Your progress
Following the instructions above, your system should now be able to determine whether or not a customer’s card is enrolled in a 3-D Secure scheme. If the customer’s card is enrolled, follow the “Authenticate the customer” section below, otherwise skip ahead to the “Authorisation” section.
2. Authenticate the customer

If the card is not enrolled, skip ahead to the “Authorisation” section.
If the customer is enrolled in the card issuer’s 3-D Secure scheme, your system must send the customer’s browser to the card issuer-hosted Access Control Server (ACS) using an HTTPS POST. The URL for the ACS can be found in the acsurl field of the THREEDQUERY response.
On the ACS, the customer will be authenticated, sometimes by prompting for a previously-agreed PIN and/or password. The browser must send data from the termurl, pareq and md in HTML fields ‘TermUrl’, ‘PaReq’ and ‘MD’, respectively (These field names are case sensitive).

Following authentication, the customer will be returned to your servers using an HTTPS POST. You will need to parse this response, as it will contain the ‘PaRes’ and ‘MD’ fields, for constructing the subsequent AUTH Request needed to process the payment.

The following is an example of how to redirect the cardholder to the card issuer’s ACS :
<!DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.01//EN'> <html> <head> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> <title>Processing payment</title> <style type="text/css"> h3,h3,h4 { font-family: verdana, arial, sans-serif; font-weight: normal;} #logo {float: left;} </style> </head> <body OnLoad="document.form.submit();" > <form name="form" id="form" action="$acsurl" method="POST"> <div> <input type="hidden" name="PaReq" value="$pareq" /> <input type="hidden" name="TermUrl" value="$termurl" /> <input type="hidden" name="MD" value="$md" /> </div> <noscript> <div> <h3>JavaScript is currently disabled or is not supported by your browser.</h3> <h4>Please click Submit to continue processing your 3-D Secure transaction.</h4> <input type="submit" value="Submit"> </div> </noscript> </form> </body> </html>
Referencing 3-D Secure transactions
In most circumstances, your system will need to store data about the transaction in your database while the customer is being authenticated on the card issuer’s ACS, to be retrieved when the customer returns to your system via the termurl. As the 3-D Secure specification requires that only the md and pares fields are returned to your system, it is recommended that the md field is used to look up any corresponding customer session to complete the transaction.
Waiting for the customer to return from the ACS
Your system will need to consider the length of time it may take for the customer to enter their details on the card issuer’s ACS. The time the customer will spend on the ACS will depend on a number of factors. Longer wait times may occur when the customer is signing up to a 3-D Secure scheme for the first time, or recovering a forgotten password. While your system needs to allow time for the customer to return, it is entirely possible for the customer to close their browser on the card issuer’s ACS and not return at all. There are no specific regulations as to how long your system must wait for the customer to be redirected from the ACS to your Term URL, but we recommend waiting for no more than two hours.
Your progress
Following the instructions above, your system should now be able to redirect the browsers of customers with cards enrolled in a 3-D Secure scheme to the ACS for authentication. Your system can now proceed and submit an AUTH request using our Webservices API to process the payment, by following the instructions below.
3. Authorisation
3-D authorisations are used to seek authorisation for authenticated transactions from your acquiring bank. This is performed by manually submitting an AUTH Request using our Webservices API and interpreting the response returned.
AUTH Request
For enrolled cards only
The following example demonstrates how to structure a 3-D AUTH request when the card is enrolled in a 3-D Secure scheme:
#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) auth= { "requesttypedescriptions": ["AUTH"], "md":"UEZOVVBqeE5SRDQ4VFVSSVBrRjVXSGhOZFZReVUzVlalBVeE", "pares":"eJzVWFmzosgSfudXdPQ8Gt1sbkzYRhQ7KCjI/sYOsimgoL/+lp7Tp5" } strequest = securetrading.Request() strequest.update(auth) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'requesttypedescriptions' => array('AUTH'), 'md' => 'UEZOVVBqeE5SRDQ4VFVSSVBtSllOVTlMYVdaUlJXWnZVRTA0UVdwVlJXZFpRo5cEk9', 'pares' => 'eJztWEnTqsi2nfMrKqqGxik6UajwJFCOxLb5BNvgHdPneIihB/fq2eNv777/BdaScGg=' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ https://webservices.securetrading.net/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "requesttypedescriptions": ["AUTH"], "md":"UEZOVVBqeE5SRDVS1FLVG9aenQrRGhaNk1NPQ==", "pares":"eJztWMmyq7iynfMVFVVDxyk6Y0OX0U1wTQ==" }]}'

For non-enrolled cards only
For cards that are NOT enrolled in the card issuer’s 3-D Secure scheme (or have unknown enrolment), you will need to submit the following fields in order to inherit transaction information needed to perform the authorisation:
#!/usr/bin/python import securetrading stconfig = securetrading.Config() stconfig.username = "[email protected]" stconfig.password = "Password1^" st = securetrading.Api(stconfig) auth= { "requesttypedescriptions": ["AUTH"], "sitereference": "test_site12345", "parenttransactionreference": "1-2-345678" } strequest = securetrading.Request() strequest.update(auth) stresponse = st.process(strequest) #stresponse contains the transaction response
<?php if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) { throw new Exception('Composer autoloader file could not be found.'); } require_once($autoload); $configData = array( 'username' => '[email protected]', 'password' => 'Password1^', ); $requestData = array( 'requesttypedescriptions' => array('AUTH'), 'sitereference' => 'test_site12345', 'parenttransactionreference' => '1-2-345678' ); $api = \Securetrading\api($configData); $response = $api->process($requestData); var_dump($response->toArray()); ?>
curl --user [email protected]:Password1^ https://webservices.securetrading.net/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{ "alias": "[email protected]", "version": "1.00", "request": [{ "requesttypedescriptions": ["AUTH"], "sitereference": "test_site12345", "parenttransactionreference": "1-2-345678" }]}'
Inheritance
The example AUTH requests shown above (both enrolled and not-enrolled) contain all the fields that are required for submission. All other information required to seek authorisation will be inherited from the previous THREEDQUERY request stored on our system.
We allow the submission of additional fields in the AUTH request that have not been submitted in the THREEDQUERY request (e.g. the customer name, if omitted in the query).
Click here for a full list of fields that can be submitted in an AUTH request.
Here is the specification of the fields included in the AUTH requests described above:
Key
Field name | Type | Length | Request | Description |
pares | Alphanumeric including symbols | 1024 | ![]() |
Only send if card is enrolled.
Must be the value returned in the pares field of the HTTPS POST from the card issuer’s ACS, otherwise this may forfeit the liability shift. |
md | Alphanumeric including symbols | 65536 | ![]() |
Only send if card is enrolled.
The unique 3-D Secure reference for this transaction. Supplied if enrolled is “Y” |
parenttransactionreference | Alphanumeric including hyphens | 25 | ![]() |
Only send if card is NOT enrolled.
Unique reference of the parent THREEDQUERY request. |
sitereference | Alphanumeric including underscore | 50 | ![]() |
Only send if card is NOT enrolled.
The site reference processing the transaction. |
AUTH Response
The data returned in the AUTH response will depend on both the card enrollment status, and whether or not the customer was successfully authenticated on the card issuer’s ACS.
Your system should be able to interpret the response data in each of the following scenarios.
Enrolled and authenticated
{ u 'requestreference': u 'Av87m7xq9', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-08 08:34:48', u 'parenttransactionreference': u '1-2-345678', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'splitfinalnumber': u '1', u 'xid': u 'amh1OCtINGpuemJaVmQreU5YT2Y=', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-07', u 'errorcode': u '0', u 'cavv': u 'Q0FWVkNBVlZDQVZWQ0FWVkNBVlY=', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'status': u 'Y', u 'transactionreference': u '1-2-345679', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'baseamount': u '1050', u 'eci': u '05', u 'accounttypedescription': u 'ECOM', u 'tid': u '27882788', u 'acquirerresponsecode': u '00', u 'requesttypedescription': u 'AUTH', u 'securityresponsesecuritycode': u '2', u 'currencyiso3a': u 'GBP', u 'authcode': u 'TEST40', u 'errormessage': u 'Ok', u 'operatorname': u '[email protected]', u 'maskedpan': u '411111######0211', u 'securityresponsepostcode': u '0', u 'enrolled': u 'Y', u 'securityresponseaddress': u '0', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '0' }] }
array(3) { ["requestreference"] => string(9) "A278afgrx" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(33) { ["transactionstartedtimestamp"] => string(19) "2016-12-09 11:46:34" ["parenttransactionreference"] => string(10) "1-2-345678" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["splitfinalnumber"] => string(1) "1" ["xid"] => string(28) "ZlcyU1hQcUhmaEtzd2I1SmkrMnM=" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-09" ["errorcode"] => string(1) "0" ["tid"] => string(8) "27882788" ["merchantnumber"] => string(8) "00000000" ["merchantcountryiso2a"] => string(2) "GB" ["status"] => string(1) "Y" ["transactionreference"] => string(10) "1-2-345679" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["baseamount"] => string(4) "1050" ["enrolled"] => string(1) "Y" ["eci"] => string(2) "05" ["accounttypedescription"] => string(4) "ECOM" ["cavv"] => string(28) "Q0FWVkNBVlZDQVZWQ0FWVkNBVlY=" ["acquirerresponsecode"] => string(2) "00" ["requesttypedescription"] => string(4) "AUTH" ["securityresponsesecuritycode"] => string(1) "2" ["currencyiso3a"] => string(3) "GBP" ["authcode"] => string(6) "TEST30" ["errormessage"] => string(2) "Ok" ["operatorname"] => string(23) "[email protected]" ["securityresponsepostcode"] => string(1) "0" ["maskedpan"] => string(16) "411111######0211" ["securityresponseaddress"] => string(1) "0" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "0" } } }
{"requestreference":"W23-n68rw97k","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 17:21:59","parenttransactionreference":"1-2-345678","livestatus":"0","issuer":"SecureTrading Test Issuer1","splitfinalnumber":"1","xid":"ZldiREFPMW5HYi90UDhxMDJTV2Q=","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","tid":"27882788","merchantnumber":"00000000","merchantcountryiso2a":"GB","status":"Y","transactionreference":"1-2-345679","merchantname":"Test Merchant","paymenttypedescription":"VISA","baseamount":"1050","enrolled":"Y","eci":"05","accounttypedescription":"ECOM","cavv":"Q0FWVkNBVlZDQVZWQ0FWVkNBVlY=","acquirerresponsecode":"00","requesttypedescription":"AUTH","securityresponsesecuritycode":"2","currencyiso3a":"GBP","authcode":"TEST05","errormessage":"Ok","operatorname":"[email protected]","securityresponsepostcode":"0","maskedpan":"411111######0211","securityresponseaddress":"0","issuercountryiso2a":"US","settlestatus":"0"}],"secrand":"bsZP"}
Enrolled but NOT authenticated
{ u 'requestreference': u 'Aq2qmp0j3', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-13 11:11:58', u 'parenttransactionreference': u '1-2-345678', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'splitfinalnumber': u '1', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-13', u 'errorcode': u '60022', u 'tid': u '27882788', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'status': u 'N', u 'transactionreference': u '1-2-345679', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'baseamount': u '1050', u 'accounttypedescription': u 'ECOM', u 'requesttypedescription': u 'AUTH', u 'currencyiso3a': u 'GBP', u 'maskedpan': u '411111######0211', u 'errormessage': u 'Unauthenticated', u 'operatorname': u '[email protected]', u 'enrolled': u 'Y', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '3' }] }
array(3) { ["requestreference"] => string(9) "A35ahjnwx" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(25) { ["transactionstartedtimestamp"] => string(19) "2016-12-13 10:41:57" ["parenttransactionreference"] => string(10) "1-2-345678" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["splitfinalnumber"] => string(1) "1" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-13" ["errorcode"] => string(5) "60022" ["tid"] => string(8) "27882788" ["merchantnumber"] => string(8) "00000000" ["merchantcountryiso2a"] => string(2) "GB" ["status"] => string(1) "N" ["transactionreference"] => string(10) "1-2-345679" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["baseamount"] => string(3) "1050" ["accounttypedescription"] => string(4) "ECOM" ["requesttypedescription"] => string(4) "AUTH" ["currencyiso3a"] => string(3) "GBP" ["maskedpan"] => string(16) "411111######0211" ["errormessage"] => string(15) "Unauthenticated" ["operatorname"] => string(23) "[email protected]" ["enrolled"] => string(1) "Y" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "3" } } }
{ "requestreference": "W23-mjuwx1f5", "version": "1.00", "response": [{ "transactionstartedtimestamp": "2016-12-13 11:00:44", "parenttransactionreference": "1-2-345678", "livestatus": "0", "issuer": "SecureTrading Test Issuer1", "splitfinalnumber": "1", "dccenabled": "0", "settleduedate": "2016-12-13", "errorcode": "60022", "tid": "27882788", "merchantnumber": "00000000", "merchantcountryiso2a": "GB", "status": "N", "transactionreference": "1-2-345679", "merchantname": "Test Merchant", "paymenttypedescription": "VISA", "baseamount": "1050", "accounttypedescription": "ECOM", "requesttypedescription": "AUTH", "currencyiso3a": "GBP", "maskedpan": "411111######0211", "errormessage": "Unauthenticated", "operatorname": "[email protected]", "enrolled": "Y", "issuercountryiso2a": "US", "settlestatus": "3" }], "secrand": "3J"
Not enrolled
{ u 'requestreference': u 'Adyw3fdbw', u 'version': u '1.00', u 'response': [{ u 'transactionstartedtimestamp': u '2016-12-07 16:47:39', u 'parenttransactionreference': u '1-2-345678', u 'livestatus': u '0', u 'issuer': u 'SecureTrading Test Issuer1', u 'splitfinalnumber': u '1', u 'dccenabled': u '0', u 'settleduedate': u '2016-12-07', u 'errorcode': u '0', u 'tid': u '27882788', u 'merchantnumber': u '00000000', u 'merchantcountryiso2a': u 'GB', u 'transactionreference': u '1-2-345679', u 'merchantname': u 'Test Merchant', u 'paymenttypedescription': u 'VISA', u 'baseamount': u '1050', u 'accounttypedescription': u 'ECOM', u 'acquirerresponsecode': u '00', u 'requesttypedescription': u 'AUTH', u 'securityresponsesecuritycode': u '2', u 'currencyiso3a': u 'GBP', u 'authcode': u 'TEST23', u 'errormessage': u 'Ok', u 'operatorname': u '[email protected]', u 'maskedpan': u '411111######0021', u 'securityresponsepostcode': u '0', u 'enrolled': u 'N', u 'securityresponseaddress': u '0', u 'issuercountryiso2a': u 'US', u 'settlestatus': u '0' }] }
array(3) { ["requestreference"] => string(9) "A256agnuw" ["version"] => string(4) "1.00" ["response"] => array(1) { [0] => array(29) { ["transactionstartedtimestamp"] => string(19) "2016-12-09 11:53:36" ["parenttransactionreference"] => string(10) "1-2-345678" ["livestatus"] => string(1) "0" ["issuer"] => string(26) "SecureTrading Test Issuer1" ["splitfinalnumber"] => string(1) "1" ["dccenabled"] => string(1) "0" ["settleduedate"] => string(10) "2016-12-09" ["errorcode"] => string(1) "0" ["tid"] => string(8) "27882788" ["merchantnumber"] => string(8) "00000000" ["merchantcountryiso2a"] => string(2) "GB" ["transactionreference"] => string(10) "1-2-345679" ["merchantname"] => string(13) "Test Merchant" ["paymenttypedescription"] => string(4) "VISA" ["baseamount"] => string(4) "1050" ["enrolled"] => string(1) "N" ["accounttypedescription"] => string(4) "ECOM" ["acquirerresponsecode"] => string(2) "00" ["requesttypedescription"] => string(4) "AUTH" ["securityresponsesecuritycode"] => string(1) "2" ["currencyiso3a"] => string(3) "GBP" ["authcode"] => string(6) "TEST08" ["errormessage"] => string(2) "Ok" ["operatorname"] => string(23) "[email protected]" ["securityresponsepostcode"] => string(1) "0" ["maskedpan"] => string(16) "411111######0021" ["securityresponseaddress"] => string(1) "0" ["issuercountryiso2a"] => string(2) "US" ["settlestatus"] => string(1) "0" } } }
{"requestreference":"W23-fwpp74eu","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 17:24:51","parenttransactionreference":"1-2-345678","livestatus":"0","issuer":"SecureTrading Test Issuer1","splitfinalnumber":"1","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","tid":"27882788","merchantnumber":"00000000","merchantcountryiso2a":"GB","transactionreference":"1-2-345679","merchantname":"Test Merchant","paymenttypedescription":"VISA","baseamount":"1050","enrolled":"N","accounttypedescription":"ECOM","acquirerresponsecode":"00","requesttypedescription":"AUTH","securityresponsesecuritycode":"2","currencyiso3a":"GBP","authcode":"TEST42","errormessage":"Ok","operatorname":"[email protected]","securityresponsepostcode":"0","maskedpan":"411111######0021","securityresponseaddress":"0","issuercountryiso2a":"US","settlestatus":"0"}],"secrand":"O3L"}
Managing authorisation response
Your system will need to interpret the AUTH response in order to determine if the transaction was successful. The most important field to check in the response is the errorcode.
Error code | Description |
0 | Cardholder was successfully authenticated on the card issuer’s ACS. Customer’s bank authorised the transaction. Funds will be transferred. |
70000 | Cardholder was successfully authenticated on the card issuer’s ACS. Customer’s bank declined the transaction. Funds will NOT be transferred. |
60022 | Cardholder was NOT successfully authenticated on the card issuer’s ACS. Trust Payments did not contact the acquiring bank to seek authorisation. Funds will NOT be transferred. |
99999 | An error code of ‘99999’ indicates an unknown error occurred, which requires manual inspection. We recommend contacting our Support Team for assistance, providing a copy of the entire request submitted and the response returned. In the interest of security, ensure you omit or mask sensitive field values, such as card details. |
other | Click here for a full list of error codes used by Trust Payments. |
Regardless of the errorcode returned in the response, we strongly recommend that you refer to our best practices and configure your system to perform all of the checks outlined.
Here is the specification of the fields that are included in the AUTH responses described above, which are specific to 3-D Secure:

Key
Field name | Type | Length | Response | Description |
enrolled | Char | 1 | ![]() |
Indicates if the cardholder is enrolled in a 3-D Secure scheme:
|
xid | Alphanumeric | 255 | ![]() |
The unique identifier for the transaction, assigned by the MPI (Merchant Plug-In) (in this case, Trust Payments). |
status | Char | 1 | ![]() |
Returned if card is enrolled.
Indicates whether or not the customer was authenticated on the card issuer’s ACS:
|
cavv | Alphanumeric | 32 | ![]() |
Returned if card is enrolled and authenticated.
The unique Cardholder Authentication Verification Value (CAVV) associated with the transaction, provided by the card issuer. |
eci | Alphanumeric | 2 | ![]() |
Returned if card is enrolled and authenticated.
The ECI (E-Commerce Indicator) security level associated with the transaction. |

Testing
We recommend that you thoroughly test your solution before processing live payments.
Click here for test card details that you can submit when testing.
JavaScript Library (version 1)

If you are integrating with us for the first time, we strongly recommend using the latest version of our JavaScript Library.
Install a library
We provide libraries for the Python and PHP programming languages. Alternatively, it is possible to use cURL in a variety of other languages. These libraries consist of functions that can be referenced within your program body without defining them explicitly.
We recommend that you follow the instructions below to download and install your preferred library on your server.
If you plan on using your own library to process requests, you will need to read “Configuring your own library“.
Python To install our Python library, you can use ‘pip‘, which is a package management system used to install and manage software packages written in Python. Alternatively, you can download the package from https://github.com/Secure-Trading/st-python-api and install the library manually. PHP You can use the following command to install our PHP library. Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will install and update them for you. cURL Provided your system already has cURL installed, no additional installation is required. Please ensure that any additional debugging enabled whilst testing your integration is disabled prior to going live. Failing to do so may contravene the requirements needed to maintain PCI compliance. You have now installed a library on your server, and you can use this to send requests to our gateway. Read on to learn how to process your first request. You can use our JavaScript Client SDK (“st.js”) to process payments without submitting the customer’s card details to your server, thereby simplifying the audit process for PCI DSS. Your server-side payment form must assign all card details with the attribute “data-st-field”. During payment form submission, “st.js” will tokenise all fields with the attribute “data-st-field” to create a unique cachetoken. This cachetoken is then submitted to your server, along with all other fields that do not have the attribute “data-st-field”. The following is an example of a payment form: To use the Client SDK, reference our “st.js” in your webpage’s HTML mark-up, as demonstrated in the payment form example above. You must ensure that your payment form has been assigned the id “st-payment”. The following are required fields and must be included in the payment form: After the customer clicks “Pay”, these fields are used to generate a unique cachetoken that will later be posted to your server, for the purpose of processing requests. Any input fields that have the attribute “data-st-field” are transmitted directly to Trust Payments from the customer’s browser session in a secure manner. This means that these sensitive payment details are never submitted to your server. A “div” element with attribute id=”st-message” is required, in order for invalid field and connection errors to be displayed, in cases when ‘st.js’ fails to generate a cachetoken. If there is an error during the cachetoken generation process, the optional CSS included in the server-side payment form example will highlight any invalid input fields on the form and style the error message returned. Ensure the action in the server-side payment form is a valid URL address hosted on your server. The address specified must be able to take the generated cachetoken and all fields without the “data-st-field” attribute, which are submitted to the Server SDK as a JSON request. If you need to perform additional tasks after the cachetoken has been passed to the customer’s browser session, but before the payment form details are submitted to your server, you can do so by passing the submitFormCallback parameter to the SecureTrading.Standard library. The response messages can be returned to the customer in the following languages: By default, the response is returned in English. In order to change the default language, simply change the locale value in the payment form example above. To return the response in the English language, set the locale to ‘en_gb’. An example of a message returned to the customer – “There has been a problem with your payment, please verify your details and try again.” You can process successful transactions by submitting the following test card numbers: Other cards are supported. Click here for further testing credentials. You should now have a basic form that can be used to collect the customer’s payment details and send a cachetoken to your server. The following describes how you can reference the SDK functions within your program body to submit a request to our servers. You can create a Web Services user using our MyST interface. Your system will need to submit this username in every request, along with the password. In our request examples we use a placeholder username and password, which you will need to replace with your own credentials before testing. If you don’t already have Web Services credentials, click here to learn how to configure this. Your server will now need to generate a request. For example: You must use a valid domain that is accessible by Trust Payments. You will need to submit the generated request to the Trust Payments library installed above. The following are examples of how to perform a request for each tool and programming language we currently support. Your system will be returned numerous fields in the response object. You will need to interpret the contents of these fields to ensure they are the values expected. The following is an example of an AUTH response: It is especially important to check the Error Code and settle status values returned in the response. In addition to processing authorisations, Trust Payments supports numerous other request types. For further information on these request types, please refer to the other pages within our online documents. Summary At this point, you should be able to process a basic request using our Webservices API. Next steps We’re here to help We hope that you find our online help resource to be useful. If you are experiencing issues with your configuration, please visit our Troubleshooting page.
pip install securetrading
composer require securetrading/stpp_json
Collecting payment details using Cachetoken
Server-side payment form
<html>
<head>
<style>
#st-payment input.st-error {
background-color: #ffc6c7;
border: 2px solid #ffb5b5;
}
#st-message .st-error {
background: #ffcdcd;
border: 2px solid #ffb5b5;
padding: 4px 4px 4px 28px !important;
}
</style>
</head>
<body>
<div id="st-message"></div>
<form id="st-payment" action="https://www.example.com">
<!--Ensure all payment details use the data-st-field attribute.-->
Pan:
<input type="text" data-st-field="pan" autocomplete="off" /></br>
Expiry Month:
<input type="text" data-st-field="expirymonth" autocomplete="off" /></br>
Expiry Year:
<input type="text" data-st-field="expiryyear" autocomplete="off" /></br>
Security Code:
<input type="text" data-st-field="securitycode" autocomplete="off" /></br>
<!--You can submit your own custom fields within this form, e.g. discount code-->
Discount Code:
<input type="text" name="discountcode" autocomplete="off" /></br>
<input type="submit" name="mybtn" />
</form>
<script src="https://webservices.securetrading.net/js/st.js"></script>
<script>
new SecureTrading.Standard({
sitereference: "test_site12345", locale: "en_gb"
});
</script>
</body>
</html>
<html>
<!-- If you need to change the names of the identifiers “st-message” and “st-payment”, -->
<!-- because your application doesn’t support the naming convention used -->
<!-- (e.g. no hyphen support), you can use the markup found here to override them. -->
<head>
<style>
#st-payment input.st-error {
background-color: #ffc6c7;
border: 2px solid #ffb5b5;
}
#st-message .st-error {
background: #ffcdcd;
border: 2px solid #ffb5b5;
padding: 4px 4px 4px 28px !important;
}
</style>
</head>
<body>
<div id="stmessage"></div>
<form id="stpayment" action="https://www.example.com">
<!--Ensure all payment details use the data-st-field attribute.-->
Pan:
<input type="text" data-st-field="pan" autocomplete="off" /></br>
Expiry Month:
<input type="text" data-st-field="expirymonth" autocomplete="off" /></br>
Expiry Year:
<input type="text" data-st-field="expiryyear" autocomplete="off" /></br>
Security Code:
<input type="text" data-st-field="securitycode" autocomplete="off" /></br>
<!--You can submit your own custom fields within this form, e.g. discount code-->
Discount Code:
<input type="text" name="discountcode" autocomplete="off" /></br>
<input type="submit" name="mybtn" />
</form>
<script src="https://webservices.securetrading.net/js/st.js"></script>
<script>
new SecureTrading.Standard({
sitereference: "test_site12345",
locale: "en_gb",
messageId: "stmessage",
formId: "stpayment",
});
</script>
</body>
</html>
Callback prior to processing a payment
new SecureTrading.Standard({
sitereference: "test_site12345",
submitFormCallback: function(responseObj){
var cachetoken = responseObj['response'][0]['cachetoken']; <!-- Grab token -->
console.log(cachetoken); <!-- Logs the token to the console (Additional steps can be performed here before submitting to your server) -->
document.getElementById(‘st-payment’).submit(); <!-- Submit the form -->
}
Language support
To return the response in the French language, set the locale to ‘fr_fr’.
To return the response in the German language, set the locale to ‘de_de’.
Test credentials
Payment type
Test PAN
Expiry date
Security code
Visa
4111111111111111
12/2030
123
Mastercard
5100000000000511
12/2030
123
Note: Any expiry date submitted to our test bank is valid, providing the date is in the future.
The cachetoken can be used in conjunction with your installed library to process a request.
Process requests using our Webservices API
"sitereference": "test_site12345",
"requesttypedescriptions": ["AUTH"],
"accounttypedescription": "ECOM",
"currencyiso3a": "GBP",
"baseamount": "1050",
"orderreference": "My_Order_123",
"cachetoken": "<INSERT TOKEN HERE>"
#!/usr/bin/python
import securetrading
stconfig = securetrading.Config()
stconfig.username = "[email protected]"
stconfig.password = "Password1^"
st = securetrading.Api(stconfig)
#Replace the example Web Services username and password above with your own
request = {
"sitereference": "test_site12345",
"requesttypedescriptions": ["AUTH"],
"accounttypedescription": "ECOM",
"currencyiso3a": "GBP",
"baseamount": "1050",
"orderreference": "My_Order_123",
"cachetoken": "<INSERT TOKEN HERE>"
}
strequest = securetrading.Request()
strequest.update(request)
stresponse = st.process(strequest) #stresponse contains the transaction response
<?php
if (!($autoload = realpath(__DIR__ . '/../../../autoload.php')) && !($autoload = realpath(__DIR__ . '/../vendor/autoload.php'))) {
throw new Exception('Composer autoloader file could not be found.');
}
require_once($autoload);
$configData = array(
'username' => '[email protected]',
'password' => 'Password1^',
);
//Replace the example Web Services username and password above with your own
$requestData = array(
'sitereference' => 'test_site12345',
'requesttypedescriptions' => array('AUTH'),
'accounttypedescription' => 'ECOM',
'currencyiso3a' => 'GBP',
'baseamount' => '1050',
'orderreference' => 'My_Order_123',
'cachetoken' => '<INSERT TOKEN HERE>'
);
$api = \Securetrading\api($configData);
$response = $api->process($requestData);
var_dump($response->toArray());
?>
curl --user [email protected]:Password1^ https://webservices.securetrading.net/json/ -H "Content-type: application/json" -H "Accept: application/json" -X POST -d '{
"alias":"[email protected]",
"version": "1.00",
"request": [{
"currencyiso3a": "GBP",
"requesttypedescriptions": ["AUTH"],
"sitereference": "test_site12345",
"baseamount": "1050",
"orderreference": "My_Order_123",
"accounttypedescription": "ECOM",
"cachetoken": "<INSERT TOKEN HERE>"
}]
}'
Handling the response
{
u 'requestreference': u 'A0bxh87wt',
u 'version': u '1.00',
u 'response': [{
u 'transactionstartedtimestamp': u '2016-12-07 11:32:44',
u 'livestatus': u '0',
u 'issuer': u 'SecureTrading Test Issuer1',
u 'splitfinalnumber': u '1',
u 'dccenabled': u '0',
u 'settleduedate': u '2016-12-07',
u 'errorcode': u '0',
u 'orderreference': u 'My_Order_123',
u 'tid': u '27882788',
u 'merchantnumber': u '00000000',
u 'merchantcountryiso2a': u 'GB',
u 'transactionreference': u '23-9-80001',
u 'merchantname': u 'Test Merchant',
u 'paymenttypedescription': u 'VISA',
u 'baseamount': u '1050',
u 'accounttypedescription': u 'ECOM',
u 'acquirerresponsecode': u '00',
u 'requesttypedescription': u 'AUTH',
u 'securityresponsesecuritycode': u '2',
u 'currencyiso3a': u 'GBP',
u 'authcode': u 'TEST36',
u 'errormessage': u 'Ok',
u 'operatorname': u '[email protected]',
u 'securityresponsepostcode': u '0',
u 'maskedpan': u '411111######0021',
u 'securityresponseaddress': u '0',
u 'issuercountryiso2a': u 'US',
u 'settlestatus': u '0'
}]
}
array(3) {
["requestreference"] => string(9) "A3579dkvx"
["version"] => string(4) "1.00"
["response"] => array(1) {
[0] => array(28) {
["transactionstartedtimestamp"] => string(19) "2016-12-09 09:52:19"
["livestatus"] => string(1) "0"
["issuer"] => string(26) "SecureTrading Test Issuer1"
["splitfinalnumber"] => string(1) "1"
["dccenabled"] => string(1) "0"
["settleduedate"] => string(10) "2016-12-09"
["errorcode"] => string(1) "0"
["orderreference"] => string(12) "My_Order_123"
["tid"] => string(8) "27882788"
["merchantnumber"] => string(8) "00000000"
["securityresponsepostcode"] => string(1) "0"
["transactionreference"] => string(10) "72-9-80003"
["merchantname"] => string(13) "Test Merchant"
["paymenttypedescription"] => string(4) "VISA"
["baseamount"] => string(4) "1050"
["accounttypedescription"] => string(4) "ECOM"
["acquirerresponsecode"] => string(2) "00"
["requesttypedescription"] => string(4) "AUTH"
["securityresponsesecuritycode"] => string(1) "2"
["currencyiso3a"] => string(3) "GBP"
["authcode"] => string(6) "TEST31"
["errormessage"] => string(2) "Ok"
["operatorname"] => string(23) "[email protected]"
["merchantcountryiso2a"] => string(2) "GB"
["maskedpan"] => string(16) "411111######1111"
["securityresponseaddress"] => string(1) "0"
["issuercountryiso2a"] => string(2) "US"
["settlestatus"] => string(1) "0"
}
}
}
{"requestreference":"W23-fjgvn3d8","version":"1.00","response":[{"transactionstartedtimestamp":"2016-12-07 15:08:47","livestatus":"0","issuer":"SecureTrading Test Issuer1","splitfinalnumber":"1","dccenabled":"0","settleduedate":"2016-12-07","errorcode":"0","baseamount":"1050","tid":"27882788","merchantnumber":"00000000","merchantcountryiso2a":"GB","transactionreference":"23-9-80006","merchantname":"Test Merchant","paymenttypedescription":"VISA","orderreference":"My_Order_123","accounttypedescription":"ECOM","acquirerresponsecode":"00","requesttypedescription":"AUTH","securityresponsesecuritycode":"2","currencyiso3a":"GBP","authcode":"TEST96","errormessage":"Ok","operatorname":"[email protected]","securityresponsepostcode":"0","maskedpan":"411111######1111","securityresponseaddress":"0","issuercountryiso2a":"US","settlestatus":"0"}],"secrand":"zO9"}