The CID (card identification) number is the 3-digit value printed on the signature panel on the back of Visa, MasterCard and Discover Cards immediately following the credit card account number. Last 3 digits on back of card.
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The CID (card identification) number is the 3-digit value printed on the signature panel on the back of Visa, MasterCard and Discover Cards immediately following the credit card account number. Last 3 digits on back of card.