Depending on your product, you may need a certificate of origin (proving where goods were made, relevant for duty preference and some prohibitions), a certificate of conformity (proving the goods meet destination-market safety or quality standards), a phytosanitary certificate (for plants and plant products), a health or veterinary certificate (for food, animals and animal products), or a fumigation certificate (for wooden packaging material, required by many countries to prevent the spread of pests). Confirm the exact list your product needs well before shipment, since some certificates can only be issued at origin, before the goods leave.