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  2. How long can a credit card charge be pending? - AOL

    www.aol.com/finance/long-credit-card-charge...

    When you swipe your credit card to make a purchase, the merchant’s acquiring bank — which handles the payments for the merchant — communicates with your card issuer to make sure that you ...

  3. 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]

  4. Credit card information: The basics you need to know - AOL

    www.aol.com/finance/credit-card-information...

    Printed on a credit card, you'll find the card number, the cardholder’s name, when the card expires and the card's security code — all the details you need to make purchases online or in ...

  5. Accepted payment methods for AOL services

    help.aol.com/articles/payment-methods-available-CS41

    Accepted payment methods. Credit or debit cards. American Express. Visa (credit or debit) Discover (credit or debit) MasterCard (credit or debit) PayPal (for most online purchases) Direct debit is no longer available for active accounts, however, it can be used to pay past due balances, with a $7 fee.

  6. Add, edit, or delete a payment method for AOL services

    help.aol.com/articles/update-your-payment-method

    If your card number has changed, you must add a new card. 1. Sign in to your My Account page. 2. Click My Wallet. 3. Click Payment Methods. 4. Click Add Credit or Debit Card. 5. Enter the new info. 6. Click Submit.

  7. 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 ...

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