A CVN (Card Verification Number) error can occur when the security code or other card details cannot be successfully verified with your card’s issuing bank. It may also appear if the card type is not supported by CoinZoom.
To resolve this issue:
Ensure the 16-digit card number is entered correctly
Verify the 3-digit (Visa, MasterCard) CVN code on your card
Double-check that your billing address matches the one on file with your bank
Make sure you are using a card type supported by CoinZoom
Refer to the image below for help locating your CVN:
If the error persists, contact your bank to confirm that the card is active and authorized for online transactions. If the error continues, this request requires assistance from our support team and will be handled by creating a support ticket.