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Where is my (CID) Customer Card ID Number?
The Customer Card ID Number (CID or CVV2/CVS2) is a three or four digit number that is unique to each card. This additional security feature is designed to protect you by helping to ensure the card is present during the purchase. It is printed only on the card, never on any receipts or statements.
(CVV2) Visa and (CVS2) Mastercard Holders
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 CID's three-digit value is printed on the signature panel on the back of Visa cards immediately following either the complete credit card account number or the last portion of the number. The CID value helps validate two things: The Customer has a Visa card in his/her possession. The Card account is legitimate. The CID is printed only on the back of Visa and Master Card, it is not contained in the magnetic stripe information, nor does it appear on sales receipts.