Ensure the supplier provides a detailed Packing List, Commercial Invoice, and Bill of Lading. For many regions, a Certificate of Origin is required to benefit from preferential tariffs. If the tents are being sent as humanitarian aid, check if the destination country offers duty-free entry for relief goods, which requires specific documentation from the receiving NGO or government body. Always clarify Incoterms; CIF (Cost, Insurance, and Freight) is often preferred for buyers who want the supplier to handle the complexities of international transit.