An Accounts Payable (A/P) Invoice is an official document used in business transactions to record the sale of goods or services. It is a type of invoice that is sent to a customer from a vendor or supplier to indicate the amount owed for goods or services provided. The A/P Invoice typically includes the date of the transaction, the name and address of the customer, the name and address of the vendor, the quantity and description of the goods or services purchased, the unit price, the total amount due, and any applicable taxes. The A/P Invoice also serves as a receipt for the customer, and can be used to track payments and reconcile accounts. The A/P Invoice is an important document in the accounts payable process, as it serves as a record of the transaction and is used to ensure that payments are made in a timely manner.