A Certificate of Origin (CoO) is an official document that certifies the country where a product was manufactured. It is often required in international trade to verify the origin of goods, which can affect tariffs and trade agreements. The CoO helps customs authorities determine the appropriate duties and regulations for imported products. There are different types of CoOs, including preferential and non-preferential certificates. Preferential CoOs can provide benefits like reduced tariffs under trade agreements, while non-preferential CoOs simply state the origin without any special trade advantages. Businesses typically obtain CoOs from authorized organizations or chambers of commerce.