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2. How to check and change your billing address - AOL

   www.aol.com/finance/check-change-billing-address...

   Your billing address also protects you through the Address Verification System, also known as AVS. ... You can also contact Wells Fargo’s credit card account management customer service line at ...

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. Luhn algorithm - Wikipedia

   en.wikipedia.org/wiki/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.

5. 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.

6. What is a credit card security code? - AOL

   www.aol.com/finance/credit-card-security-code...

   Credit card security codes are three-digit codes on the back of your card (four-digits on the front if you have an American Express card) used to verify that have the physical card. You typically ...

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 ...