NY doesn't require you to sign in front of a notary. While a bill of sale is generally valid without notarization, there are situations where it becomes a wise precaution.We recently applied for a NJ title for our 2017 Escape 19. The MVC in NJ accepted all of our documents except the bill of sale because it was not notarized. A bill of sale for a private party vehicle transfer does not need to be notarized in New Jersey, but some may choose to do so. Proof of ownership normally includes a bill of sale. The DMV does not provide a form for a bill of sale. The quick answer is, usually, no. Generally when you sell your car, you won't need to worry about notarization. Tax sale certificates are recorded in the County Clerk's Office.