I'm pretty sure I'm using what is currently branded as "Payflow Gateway" where I get a secure token and redirect the customer to payflowlink.paypal.com. I created a test account and can successfully send a customer to PayPal (creating the token with MODE=TEST and passing TRXTYPE=A), process fake card number 4111-1111-1111-1111, and return to my site. But I want to test the AVS fraud filter and it seems like the only way I can do that is to enter a live card number, namely my own. However, when I enter all the information exactly correct, including CVC and my address info, the transaction is always rejected with RESULT=12.
Does anyone know if real card numbers can be sent in test mode? If not, my next stackoverflow question will be "How can I test the Payflow Gateway AVS fraud filter".
The Payflow gateway will always decline a live credit card that is entered in test mode. Here is the documenation. Its under 'Real credit card numbers on Test Servers'. https://www.paypal-knowledge.com/infocenter/index?page=content&id=FAQ1234&actp=LIST
So to answer "How can I test the Payflow Gateway AVS fraud filter": https://www.paypalobjects.com/webstatic/en_US/developer/docs/pdf/pp_payflowpro_fps_guide.pdf Go to page 18.