What is a CID (Card Identification Number)?
The Card Identification Number (CID, CVC2, or CVV2 ) is an added security feature to help protect you against online fraud. It is a 3- or 4-digit number that appears on your credit or debit card, next to your regular card number. Because the Card Identification Number is non-embossed and therefore not printed on receipts, it helps ensure that someone cannot use your credit card information without having the card in hand.