Card Verification Code (CVV/CID):These
three or four digit numbers help ensure that the physical card is in the cardholder’s
possession while shopping online helping to prevent unauthorized or fraudulent use.
The 3-digit code is located on the BACK of the card for Visa, MasterCard and Discover.
If card type is American Express the code is located above the embossed account
number on the FRONT of the card.