Credit Card Identification Number
This number is recorded as an additional security precaution.
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American Express
4-digit, non-embossed number printed above your account number on the front of your card.
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Visa/Discover
3-digit, non-embossed number printed on the signature panel on the back of the card immediately following
the card account number.
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MasterCard
3-digit, non-embossed number printed on the signature panel on the back of the card.
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