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What is CVS/CVV/CSC?

CVS/CVV/CSC is an important security feature for credit card transactions on the Internet and over the phone. "CVV" stands for "Card Verification Value" (Discover Card calls it the "Cardmember ID") .

  • It is the three-digit number printed in the signature space on the back of most credit cards, such as Visa, Mastercard, and Discover cards. The CVS/CVV/CSC number is always the last group of numbers in the signature space on the back of the card. It is not part of your regular credit card number.
  • It is a four-digit number on the front of American Express cards. It is printed (flat), not embossed like the card number.

The CVS/CVV/CSC number enhances fraud protection and helps to validate two things:

  • The customer has the credit card in their possession.
  • The credit card number is legitimate

By helping to prevent credit card fraud, the CVS/CVV/CSC number keeps costs down for everyone.