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[[Image:CVC2SampleVisa.png|thumb|180px|right|The Card Security Code is located on the back of all [[Mastercard]]
[[Image:CIDSampleAmex.png|thumb|180px|right|On [[American Express]] cards, the Card Security Code is located on the front.]]
The '''Card Security Code''' ('''CSC'''), sometimes called Card Verification Value or '''Code''' ('''CVV''' or '''CVC'''), is a security feature for [[credit card]] transactions, giving protection against [[credit card fraud]]. There are actually two security codes. The first, called CVC1 or CVV1, is encoded on the magnetic stripe of the card and used for in-person transactions. The second one, and the most cited, is CVV2 or CVC2. It is often used to secure "card not present" transactions occurring over the Internet, by mail, or over the phone.
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