AP stands for Accounts Payables. This is a sub-process of the larger Purchase-to-Pay (P2P) process. The Process starts when the company receives an invoice (payable) and ends with the invoice being ready for payment. The process includes the (automatic or manual) data extraction to populate the invoice with the ERP system, the reconciliation of the invoice against the purchase order and /or the Goods Received records, line-level GL- coding, and Approvals. AP Automation is about automating as many of these things as possible.