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Glossary: Card Security Code

Card Security Code – usually called CVV (Visa) or CVC (MasterCard); it’s a three or four digit code located on a credit card, but not encoded on the magnetic stripe. If a client can provide such a code, it proves that he actually is in possession of the credit card and didn’t use, for example, a card number generator or a copy (skimmed) of the card.

The most common code is CVV2 (or CVC2) used in card-not-present transactions. For Visa, MasterCard, JCB, Diners Club and Discover credit and debit cards, this is a three digit code printed on the back of the card. American Express differs a bit – they have a four digit code printed above the credit card number.

Also the names of the code differ. Apart from CSC we have:


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