This is a number printed somewhere on your card. Some card issuers refer to this number as the 'Card Verification Number', 'Card Verification Value', 'Card Verification Code', 'CVV code', 'Personal Security Code', 'Security Code' or 'Card Code'. The number is not embossed on the card and hence not printed on receipts etc. making it much harder for anyone other than the cardholder to know what the code is. We require, for your safety and security, that you enter your card verification number, if it is available. If it is not available, please try using a different credit card.

Visa, Mastercard & Discover You can find your three-digit card verification number in the signature area on the back of your credit card. Your credit card number should be printed here along with a three-digit number card verification number at the end.
American Express You can find your four-digit card verification number on the front of your credit card above the credit card number on either the right or the left side of your credit card.