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  2. 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.

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

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

    A credit card security code is a three- or four-digit code that’s unique to your card. In case a merchant asks, the security code goes by a few different names , mainly the: Card Verification ...

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

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

    A card security code is a three- or four-digit number on the back of credit and debit cards that ensures the authenticity of transactions when a physical card is not presented at the point of sale ...

  5. ISO 8583 - Wikipedia

    en.wikipedia.org/wiki/ISO_8583

    Authorization identification response 39: an 2: Response code 40: an 3: Service restriction code 41: ans 8: Card acceptor terminal identification 42: ans 15: Card acceptor identification code 43: ans 40: Card acceptor name/location (1–25 card acceptor name or automated teller machine (ATM) location, 26-38 city name, 39-40 country code) 44: an ...

  6. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    The card security code is not encoded on the magnetic stripe but is printed flat. American Express cards have a four-digit code printed on the front side of the card above the number. Diners Club, Discover, JCB, Mastercard, and Visa credit and debit cards have a three-digit card security code. The code is the final group of numbers printed on ...

  7. List of FTP server return codes - Wikipedia

    en.wikipedia.org/.../List_of_FTP_server_return_codes

    300 Series: The command is not acceptable, but the requested action is on hold, pending receipt of further information. 331: User name okay, password needed. 332: No need account for login. 334: Server accepts the security mechanism specified by the client; some security data needs to be exchanged. 336: Username okay, password okay. Challenge ...

  8. How to find your credit card's security code - AOL

    www.aol.com/news/2010-06-24-how-to-find-your...

    Here's how to find the security code on any credit card in a matter of seconds. Related Articles. AOL. Savings interest rates today: Fast-track your savings with highest-paying accounts at 4.80% ...

  9. Contactless payment - Wikipedia

    en.wikipedia.org/wiki/Contactless_payment

    EMV contactless symbol used on compatible payment terminals. EMV stands for "Europay, Mastercard, and Visa", the three companies that created the standard.Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for ...