Answer

The possible result codes for the Card Verification Number check. The CVN codes are returned in the ccAuthReply_cvCode reply field for the Simple Order API, and in the auth_cv_result reply field for the SCMP API.

D	Transaction determined suspicious by issuing bank.
I	Card verification number failed processor's data validation check.
M	Card verification number matched.
N	Card verification number not matched.
P	Card verification number not processed by processor for unspecified reason.
S	Card verification number is on the card but was not included in the request.
U	Card verification is not supported by the issuing bank.
X	Card verification is not supported by the card association.
1	Card verification is not supported for this processor or card type.
2	Unrecognized result code returned by processor for card verification response.
3	No result code returned by processor.