TL;DR
DDP = easy and lowest risk with no additional costs for delivery.
DAP = hard and highest risk with additional costs to get it through Customs and to get from Customs to you.
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A guide to DAP incoterms, compared to DDP and DAT incoterms. Find out whether the buyer or seller is responsible for risks and costs with each shipping method.
www.mouseandbear.com
DDP = stuff shows up on your doorstep for the price you paid. Seller takes the risk and has responsibility until it's at your door.
DAP = stuff shows up at Customs. You are responsible for import duties and shipping from Customs to your location. Seller's risk ends at Customs. Buyer assumes all risk/fees between
arrival at Customs and final delivery.