A credit card security code is a three- or four-digit number designed to prevent fraudulent transactions. You might hear this code referred to as the Card Verification Value (CVV).

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Even though credit cards have plenty of security protection, including security codes, it's important to be mindful of where you're purchasing items and to check your statements periodically. Security ...

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It doesn't matter what you call them -- a card security code (CSC), card verification value (CVV or CV2), card verification code (CVC) or even a card.