| 300 | cvv_matches_m | The CVV provided matches the information on file with the cardholder's bank |
| 301 | cvv_no_match_n | The CVV provided doesn't match the information on file with the cardholder's bank |
| 302 | cvv_not_verified_u | The card-issuing bank received the CVV but didn't verify whether it was correct; this typically happens if the processor declines an authorization before the bank evaluates the CVV |
| 303 | cvv_not_provided_i | No CVV was provided |
| 304 | cvv_no_issuer_support_s | The CVV was provided but the card-issuing bank doesn't participate in card verification |
| 305 | cvv_na_a | The CVV was provided but this type of transaction doesn't support card verification |
| 306 | cvv_skipped_b | CVV checks were skipped for this transaction |
| 9999 | unknown | unknown |
