A New York boat bill of sale is a document recording the sale of a boat between a seller and a buyer. The completed form will include a description of the watercraft, the purchase price, and both parties' signatures.Clearly print or type all information, except signatures. A New York Trailer Bill of Sale helps streamline the registration process and proves the transfer of ownership if a dispute arises. Learn about New York bills of sale for vehicles, boats, firearms, and more. Get answers to frequently asked questions and download the templates you need. If you're purchasing or selling a boat in New York, use a NY Boat Bill of Sale to prove a transfer of ownership has occurred.