Per the testing guide (https://developer.authorize.net/hello_world/testing_guide.html) you can use specific CVV and ZIP numbers to generate specific CVV/AVS response codes.
However:
- Visa, Mastercard, Discover, and JCB have no ZIP that can be used to generate a successful Y response.
- American Express has no CVV (since it requires a 4-digit CVV) that can be used to generate a successful M response.
Am I missing something fundamental or this is impossible?
