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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. 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.

  5. Want to Decode Your Credit Card Number? Check Out This ... - AOL

    www.aol.com/news/2011-02-11-want-to-decode-your...

    In this infographic, our friends at Mint.com decode your credit card number and show you one way to determine if a card is valid.

  6. Credit card - Wikipedia

    en.wikipedia.org/wiki/Credit_card

    Portal. v. t. e. A credit card is a payment card, usually issued by a bank, allowing its users to purchase goods or services or withdraw cash on credit. Using the card thus accrues debt that has to be repaid later. [1] Credit cards are one of the most widely used forms of payment across the world. [2]

  7. What Is a Billing Zip Code? How To Find Yours for Your Credit ...

    www.aol.com/billing-zip-code-yours-credit...

    Beverly Hills, California 90210. Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be the zip code ...

  8. Get help with your AOL billing questions - AOL Help

    help.aol.com/articles/account-management...

    This is used only to verify the validity of the credit card and because you must be at least 18 years of age to purchase an AOL service. The $1 charge won’t actually be deducted from the account. The bank for the credit card should remove the charge within a day or two.

  9. 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 ...