A card security code (CSC; also called card verification data ( CVD), card verification number, card verification value (CVV), card verification value code, card verification code (CVC), verification code (V-code or V code), or signature panel code (SPC) ) is a security feature for "card not present" payment card transactions instituted to reduce the incidence of credit card fraud.

What is cvc number on a credit card? OK. Let's think. My stream of consciousness:
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To answer this question, we should know that: A card security code (CSC; also called card verification data ( CVD), card verification number, card verification value (CVV), card verification value code, card verification code (CVC), verification code (V-code or V code), or signature panel code (SPC) ) is a security feature for "card not present" payment card transactions instituted to reduce the incidence of credit card fraud. The answer is a security feature for `` card not present '' payment card transactions instituted to reduce the incidence of credit card fraud.
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