The Certification of Origin Form A is a type of Certificate of Origin. The CO allows imports from the countries included in the GSP (General System of Preferences) to qualify for the elimination or reduction of tariffs as this system gives preferential treatment. Countries included in the GSP are developing countries. The Certification of Origin Form A is a document designed and adopted at the multilateral level by UNCTAD (United Nations Conference on Trade and Development). It is used for the developing countries whose objective is to certify the origin status of the products exported to industrialized countries, to received preferential treatment in the GSP. Disclaimer Our content is not in any way legal advice or binding. The information provided by might not be the official legal or full definition. Also when pursuing a specific transaction you are encouraged to conduct your own due diligence and to consult legal counsel as appropriate.