Security Violation
A security violation has been detected during the transaction. This can indicate a tampered card, encryption failure, or a mismatch in security credentials.
Why does code 63 occur?
- CVV/CVC mismatch detected
- Tampered or cloned card detected by chip validation
- Encryption failure in the authorization message
- Security protocol violation between terminal and network
Can this transaction be retried?
No, code 63 is a hard decline and should not be retried. The underlying issue is permanent and the same card details will continue to be declined. Ask the customer for an alternative payment method.
What merchants should do
Do not retry. This indicates a potential security issue. Report the incident to your payment processor if it occurs on a face-to-face transaction. Review your terminal's security configuration.
What cardholders should do
Contact your bank immediately. There may be a security concern with your card or account that needs to be investigated.
Code 63 at a glance
Response Code
63
Name
Security Violation
Category
hard decline
Retryable
No
Related Decline Codes
Suspected Fraud
The issuing bank's fraud detection system has flagged this transaction as potentially fraudulent and declined it as a precautionary measure.
CVV2/CVC2 Mismatch
The card verification value (CVV2 for Visa, CVC2 for Mastercard) entered does not match the value on file with the issuing bank. The 3 or 4-digit security code was incorrect.
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Decline Code 63 FAQ
Frequently asked questions about decline code 63: Security Violation.