CVN Codes Table 12 CVN Codes Code Description D The transaction was considered to be suspicious by the issuing bank. I The CVN failed the processor's data validation. M The CVN matched. N The CVN did not match. P The CVN was not processed by the processor for an unspecified reason. S The CVN 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 An unrecognized result code was returned by the processor for the card verification response. 3 No result code was returned by the processor.