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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]
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.
Egg Banking plc. Egg was an internet bank headquartered in Derby, that is now a trading name of Yorkshire Building Society. [ 1] Egg was born out of the banking arm in the United Kingdom of Prudential plc, which was established in 1996, and the Egg brand was launched in October 1998. The first online credit card was launched in September 1999.
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Mastercard Inc. (stylized as MasterCard from 1979 to 2016, mastercard from 2016 to 2019) is an American multinational payment card services corporation headquartered in Purchase, New York. [ 3] It offers a range of payment transaction processing and other related-payment services (such as travel-related payments and bookings).
U.S. Bank Altitude® Reserve Visa Infinite® Card *. U.S. Bank Triple Cash Rewards Visa® Business Credit Card *. Advantages of this card issuer: U.S. Bank credit cards may not be as popular as ...
These codes are in slightly different places for different card issuers. The CSC for Visa, Mastercard, and Discover credit cards is a three-digit number on the back of the card, to the right of the signature box. The CSC for American Express is a four-digit code on the front of the card above the account number. See the figures to the right for ...
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