What is the official business definition of Ap Function? Ap Function is a term used to describe the activities of a company’s Accounts Payable department. It involves the processing of invoices and other financial documents necessary for the payment of goods and services. This includes reconciling vendor invoices, creating and submitting payment requests, tracking payments, and providing reporting services to the various departments within the company. Ap Function also includes setting up and maintaining vendor files, tracking the status of payments, and resolving invoice issues. Additionally, it involves communicating with vendors to ensure that payments are made on time and following up on any discrepancies. The Ap Function is a critical part of a company’s financial operation and helps to ensure that all payments are made in a timely and accurate manner. Without an Ap Function, a company could quickly find itself in financial trouble due to late or inaccurate payments.