Credit Card CVV2 Response Codes

Overview

The payment processor verifies the CVV2 (card verification value) in a credit card transaction and sends a response code that indicates the results of the validation check. You cannot accept an order if the payment processor returns a failure response code.

These response codes are provided for informational purposes only and are subject to change without notice. Approval should be determined using the authorization response code and not be based on these specific response codes.

Response Codes

Response Code	Description	Action
M	CSC match	Good, send order
N	CSC no match	Consumer fix required, resend
P	CSC validation not performed or not requested	Accept order – system issue
S	Card issuer states CSC on card but merchant did not provide	Accept order – system issue
U	Card issuer not certified for CSC validation; check not performed	Accept order
X	CSC validation service provider did not respond	Accept order
0	CSC validation service not available	Accept order
T	CSC for new card purchase tx with temporary CVV/CSC	Accept order