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Invoice
commercial document issued by a seller to a buyer, relating to a sale transaction and indicating the products, quantities, and agreed prices for products or services the seller has provided the buyer / From Wikipedia, the free encyclopedia
An invoice is a document used in commerce, particularly in retail. It is made by a person or company who is selling something to a customer (or "buyer"). The invoice is given to the customer as a request for payment. It lists the goods or service provided to the customer, along with the price being charged for each of them.
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Once the customer has paid for the goods or services, they may be given a receipt. The receipt is the customer's proof that they have paid for the products. A receipt is not the same thing as an invoice.[1]
From the seller's point of view, an invoice is called the sales invoice. From the buyer's point of view, an invoice is called the purchase invoice.