The seller pays freight on DDP terms. In fact, the seller has the maximum risk and obligations under these terms. They must pay all shipping charges as well as taxes and import duties on the goods. The seller is typically responsible for more than traditional CFR (Cost & Freight) shipping or even CIF (Cost, Insurance, & Freight). While the seller likely should purchase insurance to cover the shipment, they also bear the responsibility to get the items through customs in the destination country.