What is a CSC, CID or CVV2?

The CSC, CID or CVV2 is a three- or four-digit number that is printed on your credit card. This code is required for all of our credit card transactions, in an effort to reduce fraud. Since this code number is printed on your credit card but not stored anywhere, the only way to know the correct security code number for your credit card is to physically have possession of the card itself.