NY doesn't require you to sign in front of a notary. Proof of ownership normally includes a bill of sale.The DMV does not provide a form for a bill of sale. While a bill of sale is generally valid without notarization, there are situations where it becomes a wise precaution. Write your New York Bill of Sale Form in minutes with our free online form builder. Get step-by-step guidance and avoid missing any essential details. Does a bill of sale have to be notarized in New York? No. A bill of sale for a private party vehicle transfer does not need to be notarized in New York. 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. It documents information about the buyer, seller, and vehicle that is necessary for registration and titling.