CARD SECURITY CODE

What is a Card Identification Number?

For Visa, MasterCard and Discover Cards

For American Express Cards
 
For Visa, MasterCard and Discover Cards
Back view of a sample Visa, MasterCard, or Discover Card Turn the card over and look at the signature box. You will find either the entire 16-digit credit card number or just the last 4 digits, followed by the 3-digit CIN.
 

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