These documents are crucial and are helpful when shipment processing is taking place. A commercial invoice helps the authorities to understand the terms of the transaction.  In contrast, you can use a certificate of origin to indicate the exporter's place. It is for appropriate testing and drafting of import duties for goods. The exporter issues this certificate. It confirms and certifies the country of origin of its products.  Thus, it helps customs officials recognize the parties involved in the export. The Chamber of Commerce can stamp the document. The commercial invoice supports the same by declaring the exact information.