Exporting Customs Power of Attorney/Export Customs Form 446: NAFTA Verification of Origin Customs Form 3229: Certification of Origin Customs Form 434: NAFTA Certificate of Origin Customs Form 434A: NAFTA Certificate of Origin Importing Customs Power of Attorney/Import Customs Sub-Power of Attorney/Export Customs Form 3299: Free Entry of Unaccompanied Articles Declaration for Electronic Products - FDA2877 Customs Form 3311: Free Entry of Returned American Products Customs Form 400: ACH Application Customs Form 5523: Invoice Details for Footwear