A ‘Commercial Invoice’ is a document which states the price paid for the goods that have been purchased. It will also include information such as the goods purchased, the currency of payment, the buyer’s name and delivery address as well as the seller’s name and address. A paper copy of the Commercial Invoice is usually included with the goods, although an electronic version is typically sent as well. The commercial invoice is a document between the supplier and the customer that clearly describes the sold goods, and the amount due on the customer. The commercial invoice is one of the main documents used by customs in determining customs duties.