Find out what documents you will need to provide proof of sale and ownership if you are buying, selling, or gifting a vehicle. 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. Car sellers need this form to legally transfer ownership. 2. Buyers require it as proof of purchase for registration. 3. Customer Registration Form, Refund and Transfer of Credit Application, Customer Dispute Form, Request a Water Conservation Kit, Commercial Forms. Protect your interests when buying or selling a vehicle in New York. Save time and stress with our vehicle bill of sale template. Intheblanks form authorizing a filing agent to efile documents on behalf of an individual attorney. Filling out the DTF-802 form accurately is vital for processing vehicle sale or transfer details in New York State.