DDU stands for "Delivered Duty Unpaid" and is a term used in international shipping. It refers to a shipment where the seller is responsible for shipping the product to an agreed-upon place and has all the costs and risks during the shipping, but they do not have to bother with customs formalities. The buyer is responsible for taking care of the customs procedures and paying custom duties, taxes, and other fees. In DDU shipping, the buyer is responsible for paying for all necessary taxes, duties, and customs fees required for customs clearance into the destination country. DDU shipments cannot pre-clear customs, so there may be a considerable delay before the buyer receives notification that their package is available for pick-up. DDU works best in situations where buyers are importing a large number of items for resale or their use.