A nonnegotiable commercial instrument issued by a seller to a buyer. It identifies both the trading parties and lists, describes, and quantifies the items sold, shows the date of shipment and mode of transport, prices and discounts (if any), and delivery and payment terms.
In certain cases (especially when it is signed by the seller or seller's agent), an invoice serves as a demand for payment and becomes a document of title when paid in full. Types of invoice include commercial invoice, consular invoice, customs invoice, and pro forma invoice.
Use invoice in a sentence
You should try and write up an invoice any time there is a big deal so that you have good records of it.
I had to send over the invoice before the next day because the manager really needed it right away and would fire me if I did not give it to him.
You should be sure to read over any invoice you receive to make sure you are getting everything you are supposed to.