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What is the purpose of the Card ID (also CVV2 or CVC2) number?

April 26, 2017card CVC2 CVV2 Id purpose

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What is the purpose of the Card ID (also CVV2 or CVC2) number?

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Those 3 (or 4 for American Express) digits are for a fraud-prevention system used by our credit card processor to verify that the customer actually has the card. Since those numbers do not appear on any statement or receipt, only the cardholder would have access to it. We require the Card ID as well as the billing address to match the numbers on file with your credit card company in order to accept your card as payment.