A Certificate of Origin (CO) certifies the country in which a product was manufactured. Customs authorities use it to determine duty rates, enforce trade agreements, apply sanctions, and verify compliance with rules of origin. This complete guide covers preferential vs non-preferential COs, USMCA certifications, EUR.1 certificates, Form A GSP, substantial transformation, tariff shift rules of orig...
What is a Certificate of Origin? The Complete Guide for Exporters, Importers, and Customs Brokers
Published: June 14, 2026 | Author: Trade Compliance Records | Category: Trade Compliance Fundamentals
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Summary
A Certificate of Origin (CO) is a trade document that certifies the country in which a product was manufactured, produced, or substantially transformed. It is one of the most frequently required documents in international trade — customs authorities use it to determine duty rates, enforce trade agreements, apply sanctions, and verify compliance with rules of origin. Getting the certificate of origin wrong can result in denial of preferential duty rates, customs delays, penalties, and in some cases, seizure of goods. This guide explains the different types of certificates of origin, how they are issued, how to determine origin, and how to avoid the most common errors.
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Why Certificates of Origin Matter
The country of origin of a product determines three critical things in international trade: the applicable duty rate, the eligibility for preferential treatment under free trade agreements, and whether the product is subject to trade restrictions such as antidumping duties, countervailing duties, sanctions, or import bans.
A product manufactured in Vietnam and a product manufactured in China may be physically identical, but they will face entirely different duty treatment when imported into the United States. The Chinese product may be subject to Section 301 tariffs of 25% or more, while the Vietnamese product may enter at the standard Most Favored Nation (MFN) rate. The certificate of origin is the document that establishes which treatment applies.
The stakes are high. The US Department of Justice has prosecuted multiple cases of origin fraud — falsely declaring Chinese-origin goods as Vietnamese or Malaysian to avoid Section 301 tariffs. Penalties include criminal prosecution, civil penalties up to four times the unpaid duties under 19 USC 1592, and potential debarment from US trade.
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The Two Categories of Certificates of Origin
All certificates of origin fall into one of two categories: preferential and non-preferential. The distinction determines which document is required and what it proves.
Preferential Certificates of Origin
A preferential certificate of origin is used to claim a reduced or zero duty rate under a free trade agreement (FTA) or preferential trade program. It certifies that the product meets the specific rules of origin defined in the applicable FTA or program, and therefore qualifies for the preferential duty rate.
Preferential COs are only valid for trade between the specific countries covered by the FTA or program. A USMCA Certificate of Origin is only valid for goods traded between the United States, Canada, and Mexico. A EUR.1 Movement Certificate is only valid for goods traded between the EU and countries with which the EU has an FTA that recognizes the EUR.1 form.
Non-Preferential Certificate...