ABA Routing Number- A unique bank identifying number that directs electronic ACH deposits to the proper bank. This number proceeds the account number printed on the bottom of the check.
Account Number- A unique sequence of numbers assigned to a card holder account which identifies the issuer and type of financial transaction card.
ACH- Automated Clearing House for transferring settlement funds to merchants.
Approval Code- A code issued by a card issuing bank allowing a sale to be charged against a card holders account.
Acquirer- A bank that sponsors merchants for the acceptance of credit card transactions.
Associations- Visa and MasterCard
Authorization Code- The numeric or alpha numeric code sent by the card issuer, given to a sales transaction as verification that the sale has been authorized.
Average Ticket- The average dollar amount of merchant credit card transactions.
AVS- (Address Verification Service) A service that verifies the cardholders billing address in order to help combat fraud in "card not present" transactions.