Issuer not certified and/or has not provided encryption keys.
enumerator CVV2_NOT_PROVIDED
No CVC/CVV provided.
enumerator CVV2_INVALID_LENGTH
Wrong length of the unpredictable number during CVC3 validation.
enumerator CVV2_NOT_PRESENT
Merchant indicated that CVV2 was not present on card.
enumerator CVV2_VALIDATION_UNAVAILABLE
CVC/CVV validation was not available.
enumerator CVV2_NOT_PROCESSED
Not processed.
enumerator CVV2_NO_RESPONSE
No response.
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