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What is a Card Verification Number (CVN)?

This is a 3 or 4 digit code that provides extra security for online payments. For Visa, Mastercard and Diners, this is a 3 digit number usually printed on the back of the signature panel. For Amex, this is the 4 digit number on the front of the card above the embossed card number.

Red credit card with a visible number, expiration date, and security code.
Red American Express credit card with visible details and numbers.