The official business definition of an Invoice Order is a document issued by a seller to a buyer, indicating the products, quantities, and agreed prices for products or services the seller has provided the buyer. An invoice order also serves as a record of the transaction, and can be used by the buyer to prove that an order was placed. An invoice order is usually sent to the buyer after the goods or services have been delivered, and payment is expected in full upon receipt. It is important to note that an invoice order is not a legally binding document, but rather a request for payment from the buyer. Additionally, an invoice order should include the seller’s contact information, a description of the goods or services provided, the quantity and price of each item, the total amount due, and any applicable taxes or fees.