A commercial invoice is a legal document between the supplier (consignor) and the customer (consignee). This document should include payment details, instructions, and terms. The commercial invoice is one of the most important documentsnin international trade, and the information contained within this document is used to create the customs declaration. Providing the commercial invoice when you make your declaration to us is a legal requirement under Article 156 of the Customs Code (Decree Law: 14/2017). Although there is no standard format, the commercial invoice must include a few specific pieces of information, such as the parties involved in the shipping transaction, the goods being transported, the country of manufacture, and the Harmonized System codes for those goods. A commercial invoice should also include a statement certifying that the invoice is true, and a signature.