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2. Luhn algorithm - Wikipedia

   en.wikipedia.org/wiki/Luhn_algorithm

   Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in US patent 2950048A, granted on 23 August 1960. [1]

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. The credit card company or issuing bank ...

4. 3-D Secure - Wikipedia

   en.wikipedia.org/wiki/3-D_Secure

   3-D Secure. 3-D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The name refers to the "three domains" which interact using the protocol: the merchant/acquirer domain, the issuer domain, and the interoperability domain. [1]

5. Payment Card Industry Data Security Standard - Wikipedia

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

   The Payment Card Industry Security Standards Council (PCI SSC) was then formed, and these companies aligned their policies to create the PCI DSS. [2] MasterCard, American Express, Visa, JCB International and Discover Financial Services established the PCI SSC in September 2006 as an administrative and governing entity which mandates the ...

6. Payment card number - Wikipedia

   en.wikipedia.org/wiki/Payment_card_number

   Payment card numbers are composed of 8 to 19 digits, [1] The leading six or eight digits are the issuer identification number (IIN) sometimes referred to as the bank identification number (BIN). [2]: 33 [3] The remaining numbers, except the last digit, are the individual account identification number. The last digit is the Luhn check digit.

7. Check verification service - Wikipedia

   en.wikipedia.org/wiki/Check_verification_service

   Account status verification systems give you the status of the account as of the beginning of the business banking day. They tell you if there is an open active account at that bank and if the check is likely to clear. Status messages such as closed account, NSF, stop payment or invalid account can help determine if a check or ACH transaction ...