Methods and systems are described that allow supplier information to be captured and processed for imported or exported products that have multiple supply sources. Each of the products may be classified under a plurality of HTS (Harmonized Tariff Schedule) codes, which may then be assigned to the product. The assigned HTS codes may be entered and stored in a database of a trade compliance system. A plurality of certifications may be requested and obtained from the suppliers of the product. The certifications, which may include a COO certification or a NAFTA certification, for example, may be entered and stored in the database. Each certification may identify and certify one of the multiple supply sources for the product. Each certification may be associated with one of the plurality of HTS codes.