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  2. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    American Express usually uses the four-digit code on the front of the card, referred to as the card identification code (CID), but also has a three-digit code on the back of the card, referred to as the card security code (CSC). American Express also sometimes refers to a "unique card code". [2] "CVD" or "card verification data": Discover

  3. What is a credit card security code? - AOL

    www.aol.com/finance/credit-card-security-code...

    Card Identification number (CID) ... Is a credit card security code 3 or 4 digits? Security codes are typically three digits, but it could vary by card network. For example, American Express ...

  4. What Is a Credit Card Security Code and Why Is It ... - AOL

    www.aol.com/credit-card-security-code-why...

    For American Express, the four-digit CID code is usually located on the front of the card to the right of or slightly above the card number. The CID is printed on the card but is not raised or ...

  5. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    American Express: 34, 37 [7] Yes 15 [8] Luhn algorithm: Bankcard [9] 5610, 560221–560225 No 16 China T-Union: 31 Yes 19 China UnionPay: 62 Yes 16–19 [10] Diners Club enRoute: Yes 15 No Validation Diners Club International [11] 30, 36, 38, 39 Yes 14–19 [10] Luhn algorithm: Diners Club United States & Canada [12] 55 Yes 16 Discover Card ...

  6. American Express - Wikipedia

    en.wikipedia.org/wiki/American_Express

    Share of the American Express Company, 1865. In 1850, American Express was started as a freight forwarding company in Buffalo, New York. [14] It was founded as a joint-stock corporation by the merger of the cash-in-transit companies owned by Henry Wells (Wells & Company), William G. Fargo (Livingston, Fargo & Company), and John Warren Butterfield (Wells, Butterfield & Company, the successor ...

  7. What Is a Credit Card Security Code and Why Is It ... - AOL

    www.aol.com/finance/credit-card-security-code...

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    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  9. Address verification service - Wikipedia

    en.wikipedia.org/wiki/Address_verification_service

    Following a request from a merchant for an address verification, the credit card processor sends an AVS response code back to the merchant indicating the degree of address matching. The meaning of the codes vary between credit card processors. Merchants can use the AVS code to determine whether to accept or reject a credit card transaction.