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2. Online authorisation - Wikipedia

   en.wikipedia.org/wiki/Online_authorisation

   Online Authorization (OLA) is a system used to verify a transaction on a payment card (e.g. credit card). [1] The term 'on-line' refers to the real-time nature of the verification. In other words, if the account is overdrawn, in most cases, the transaction will be refused.

3. 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.

4. Strong customer authentication - Wikipedia

   en.wikipedia.org/wiki/Strong_customer_authentication

   Article 97(1) of the directive requires that payment service providers use strong customer authentication where a payer: [7] (a) accesses its payment account online; (b) initiates an electronic payment transaction; (c) carries out any action through a remote channel which may imply a risk of payment fraud or other abuses.

5. ISO 8583 - Wikipedia

   en.wikipedia.org/wiki/ISO_8583

   ISO 8583 is an international standard for financial transaction card originated interchange messaging. It is the International Organization for Standardization standard for systems that exchange electronic transactions initiated by cardholders using payment cards.

6. Payment terminal - Wikipedia

   en.wikipedia.org/wiki/Payment_terminal

   PAX Technology S90 credit card terminal with a Visa card inserted.. A payment terminal, also known as a point of sale (POS) terminal, credit card machine, card reader, PIN pad, EFTPOS terminal (or by the older term as PDQ terminal which stands for "Process Data Quickly" [1]), is a device which interfaces with payment cards to make electronic funds transfers.

7. Payment card - Wikipedia

   en.wikipedia.org/wiki/Payment_card

   The use of a credit card to withdraw cash at an ATM is treated differently to an POS transaction, usually attracting interest charges from the date of the cash withdrawal. The use of a debit card usually does not attract interest. Third party ATM owners may charge a fee for the use of their ATM. Most payment cards, such as debit and credit ...