Understanding AMEX Security Codes
American Express cards are unique in that they have two different security codes:
4-digit CID - Found on the front of the card (above the card number)
3-digit CVV - Found on the back of the card (in the signature panel)
Troubleshooting
If your payment is declined:
Double-check that you're using the 3-digit code from the back, not the 4-digit code from the front
Ensure all other card details (number, expiration date, billing address) are correct
Contact your card issuer if the issue persists
Still having trouble? If you continue to experience issues with your American Express card payment, please contact the event organizer directly or reach out to our support team for assistance.
This applies specifically to American Express cards. Visa and Mastercard users should continue using the 3-digit code found on the back of their cards as usual.