Offline Debit: Debit card transactions using a VISA/MasterCard branded card that looks like a credit card. The transaction must adhere to VISA/MasterCard debit regulations and the merchant is required to pay a discount fee. Cashback is not available.

On-Us Entries: Financial institution debit and credit entries to accounts held at the same institution. Such entries are posted internally to the appropriate accounts.

On-Us Transaction: Any electronic banking transaction in which the acquirer and the issuer are the same institution.

Online Debit: Debit card transactions that are instantly debited from the cardholder's bank account. No signature is required. A pin pad is required at the point of sale. Cashback is available and the funds are guaranteed.

Open-to-Buy: The difference between the credit limit assigned to a cardholder account and the present balance on the account.

Operating Procedures: The current manual prepared by an acquiring processor, containing operational procedures, instructions and other directives relating to card transactions.

Operating Risk: The sum total of cumulative chargeback risk exposure plus the cumulative credit risk exposure with a given merchant.

Operating Rules: Rules and business practices meant to increase consistency and interoperability among the various financial service providers that will interact with each other and end-users. Examples of operating rules include: authorization procedures, settlement timing requirements, audit and accounting rules, and credit limits.

Original Draft: The actual bank copy of the form used in the transaction. Also referred to as the 'hard copy.'

Originator: A financial institution that initiates a wire transfer or automated clearing house (ACH) payment.

Outlet: One location of a chain.