 (front of card)
If you are using American Express, the security code is a 4-digit code located on the front of your card. It is to the right of and above your credit card number.
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   (back of card)
If you are using VISA, Mastercard, or Discover, the security code is a 3-digit code located on the back of your card. It appears in the top right of the signature box.
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