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  2. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    The check digit is calculated by (()), where s is the sum from step 3. This is the smallest number (possibly zero) that must be added to s {\displaystyle s} to make a multiple of 10. Other valid formulas giving the same value are 9 − ( ( s + 9 ) mod 1 0 ) {\displaystyle 9-((s+9){\bmod {1}}0)} , ( 10 − s ) mod 1 0 {\displaystyle (10-s){\bmod ...

  3. Address verification service - Wikipedia

    en.wikipedia.org/wiki/Address_verification_service

    An address verification service (AVS) is a service provided by major credit card processors to enable merchants to authenticate ownership of a credit or debit card used by a customer. [1] AVS is done as part of the merchant's request for authorization in a non-face-to-face credit card transaction.

  4. Check verification service - Wikipedia

    en.wikipedia.org/wiki/Check_verification_service

    Some banks bundle a level of this service with a business checking account or with a bank credit card acceptance program. Check verification companies will often offer one, two, or all of the different services in their own system. Some check verification services also offer collection agency service [2] for the civil prosecution of check fraud.

  5. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    Modulo 10 check digits in credit card account numbers, calculated by the Luhn algorithm. Also used in the Norwegian KID (customer identification number) numbers used in bank giros (credit transfer), Used in IMEI of mobile phones. Last check digit in EAN/UPC serialisation of Global Trade Identification Number . It applies to GTIN-8, GTIN-12 ...

  6. Payment Card Industry Data Security Standard - Wikipedia

    en.wikipedia.org/wiki/Payment_Card_Industry_Data...

    It was created to better control cardholder data and reduce credit card fraud. Validation of compliance is performed annually or quarterly with a method suited to the volume of transactions: [1] Self-assessment questionnaire (SAQ) Firm-specific Internal Security Assessor (ISA) External Qualified Security Assessor (QSA)

  7. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    A payment card number, primary account number (PAN), or simply a card number, is the card identifier found on payment cards, such as credit cards and debit cards, as well as stored-value cards, gift cards and other similar cards. In some situations the card number is referred to as a bank card number. The card number is primarily a card ...