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2. Authorization hold - Wikipedia

   en.wikipedia.org/wiki/Authorization_hold

   Authorization hold (also card authorization, preauthorization, or preauth) is a service offered by credit and debit card providers whereby the provider puts a hold of the amount approved by the cardholder, reducing the balance of available funds until the merchant clears the transaction (also called settlement), after the transaction is completed or aborted, or because the hold expires.

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. What is a demand deposit account (DDA)? - AOL

   www.aol.com/finance/demand-deposit-account-dda...

   A direct debit authorization refers to transactions you make using your debit card. An example would be a debit card purchase you make at the grocery store. Types of demand deposit accounts

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. Card security code - Wikipedia

   en.wikipedia.org/wiki/Card_security_code

   A card security code ( CSC; also known as CVC, CVV, or several other names) is a series of numbers that, in addition to the bank card number, is printed (but not embossed) on a credit or debit card. The CSC is used as a security feature for card not present transactions, where a personal identification number (PIN) cannot be manually entered by ...