Credit Card Verification Numbers
To help guard against fraud,
the major credit card companies have implemented a system
to ensure the credit card used in a transaction is actually
possessed by the user. This system may be variously called
CVV2 (Visa), CVC2 (MasterCard), or CID (American Express).
The verification number is a non-embossed number printed
on the credit card.
Visa, MasterCard, and Discover
For Visa, MasterCard, and Discover
cards, the number is located on the back of your card near
your signature. The number on these cards is three digits
long.
American Express
For American Express cards,
the number is located on the front of your card, on the
right hand side above your card number. The number on American
Express cards is four digits long.
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