Ap Billing, also known as Accounts Payable Billing, is the process of generating invoices and administering payments for goods or services. It begins with a purchase order that’s been approved, followed by the receiving of goods or services. A vendor invoice is then created and sent out for payment, after which point accounts payable can start processing the payment. Ap Billing involves tracking all the documents associated with the transaction, from purchase orders to receipts to invoices, in order to ensure accuracy and compliance with government regulations. This valuable process helps businesses save money by streamlining their billing processes and reducing human error.