The test system comes complete with an ACS simulator, which allows your developer to simulate the most common responses that might come back from the cardholder’s bank’s access control server.

There are 4 possible conditions that can be simulated:

1. Password Correct – the case where the cardholder enters the correct 3D Secure password. Relates to a 3D Secure status of “Y”
2. Password Incorrect – the case where the cardholder enters the wrong 3D Secure password. Relates to a 3D Secure status of “N”
3. Attempted Processing – the case where the cardholder attempted to authenticate themselves, but this could not be completed for some reason. Proof of this attempt is returned with the payment response Relates to a 3D Secure status of “A”
4. Unknown Error – the case where an unexpected error occurred whilst trying to authenticate the Relates to a 3D Secure status of “U”