If you just purchased the car, you need the title signed over to you and a bill of sale to show the purchase price for sales tax purposes. Get a bill of sale in New York to be used for any vehicle, horse or general bill of sale record. Forms.The new owner must give the original bill of sale to the DMV along with the other required proofs of ownership when they title and register the vehicle. Carefully examine all documents before you pay for the vehicle. They have a proof of ownership form you fill out then they run the Vin thru the data base to make sure it is clean. What should you include in your vehicle bill of sale? Transfer, Replace, or Change Title To prove vehicle ownership, it's important to have a valid, up-to-date, and accurate Certificate of Title. Vehicle Industry Registration Procedures Manual. Driver Education illustration. Mobile Home, Off-Highway Vehicle or Vessel.