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The Card Identification # is the 4 digit, non embossed number printed above your account number on the face of your card. This number is recorded as an additional security precaution.
An important new security feature for card-not present transactions now appears on the back of most visa cards. This new feature is a three-digit value which provides a cryptographic check of the information embossed on the card.
The CVV2 three-digit value is printed on the signature panel on the back of the cards immediately following the card's account number.