Which of the following is used to show that goods imported were produced in an ECOWAS member country

The document used to show that goods imported were produced in an ECOWAS (Economic Community of West African States) member country is a "Certificate of origin." This certificate is an official document that provides evidence that the goods being imported were produced, manufactured, or processed in an ECOWAS member state. The certificate of origin is usually issued by a chamber of commerce or a designated government agency in the exporting country, and it includes details such as the exporter's name, the consignee's name, the country of origin, the product's description, and the shipment value. The certificate of origin is an essential document for customs clearance and is used to determine the applicable duties and taxes on the imported goods.