The document certifies that goods were manufactured in the United States. It is signed by the shipper and may also be a certified by a local Chamber of Commerce, notarized, and even visaed by a resident foreign consul. A Certificate of Origin may be required by a foreign government for control purposes, or by the foreign importer to ensure that he receives U.S. goods. Specific C/Os are required for duty reductions with Canada (U.S./Canada Free Trade Agreement) and Israel (U.S./Israel Free trade Area).