![]() The CSC for American Express is a four-digit code on the front of the card above the account number. The CSC for Visa, Mastercard, and Discover credit cards is a three-digit number on the back of the card, to the right of the signature box. ![]() These codes are in slightly different places for different card issuers. It was instituted to reduce the incidence of credit card fraud. The CSC is used as a security feature for card not present transactions, where a personal identification number (PIN) cannot be manually entered by the cardholder (as they would during point-of-sale or card present transactions). ![]() On American Express cards, the card security code is a printed, not embossed, group of four digits on the front towards the rightĪ card security code ( CSC also known as CVC, CVV, or several other names) is a series of numbers that, in addition to the bank card number, is printed (not embossed) on a card.
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