 Taking Vietnam as an example, a Vietnamese exporter will apply for a preferential certificate of origin Form A for GSP purposes, Form D if exported to another ASEAN country, Form E if exported to China under the ASEAN-China trade agreement, Form AK if exported to China under the ASEAN-Korea trade agreement, etc.Particularly, if his trade partner is a Japan importer, this Vietnamese exporter may need to choose among Form A (GSP), Form AJ (ASEAN-Japan) or Form VJ (Vietnam-Japan), depending on the preferential agreement that he opts to adhere to.However, virtually all certificate of origin forms adopt a similar template, with fields to be filled in covering the country of origin, shipper's name and address, consignee's name and address, transport detail, product description and quantity, and the issuing body's stamp and signature if authorized certification is required.