(Airlines Clearing House) – The A4A clearinghouse for electronic invoicing.

(ATPCO, IATA, ARC) – AIA is the organisation formed by ATPCO, IATA, and ARC to support the First & Final™ process.

(Airlines Reporting Corp.) – ARC operates COMPASS® which houses transaction and prorate data for the purposes of settlement.

(Airlines for America) – The trade group for U.S.-based airlines.

ATPCO, amongst other services, operates the Sales Exchange process whereby sales for First & Final™ trans

A feature of SIS whereby a billing carrier is able to submit a list of uplifts. SIS will then find the prorate (either a stored own prorate or an NFP) and create the necessary billing, settlement, and invoice files. A pro-forma invoice is sent to the billing carrier daily, and invoices are sent to the billing and billed carrier on settlement.

(Billing and Settlement Plan) – An IATA service for the settlement of ticket revenues between agents and carriers. BSP fees can appear on electronic invoices.  More information on BSP

(Call Day Adjustment) –An adjustment based on the difference between the exchange rates of Miscellaneous items as submitted to the ICH and the exchange rate used on Call Day.

(Clearinghouse) – The general term and acronym for a clearinghouse, whether the ACH  or ICH.

A digital signature is analogous to its analog namesake and proves two things: that the claimed party generated the document, and that the document was not altered after being signed. Digital signatures are required on electronic invoices in some countries.