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The card security code is a unique three or four-digit number printed on your debit/credit card. The number is not embossed on the card so that it cannot be printed on receipts - making it difficult for anyone other than the genuine cardholder to know it.
|Some cards, many UK-issued cards for example, have a three-digit number printed at the top of the signature strip on the reverse of the card.|
|Others, American Express cards for example, have a four-digit number printed on the front of the card, above the account number.|