A commercial invoice is the basic statement of the seller to the buyer for payment of the goods shipped. It must conform to any Letter of Credit requirements, foreign government requirements, an export control requirements regarding destination statements. It is used as one of the primary documents in the collection process, and is the main document used by foreign Customs for control, valuation of the goods, pricing, terms of sale, payment and delivery, credit numbers, import license numbers, shipper and consignee names, and shipping marks and numbers. Commercial invoices are usually signed by the exporter.