This document will require notarization and may be required for registration. When selling a vehicle, the seller must sign and handprint their name on the proof of ownership document.Learn about bills of sale in Pennsylvania for vehicles, firearms, animals, etc. 1. Enter the Buyer and Seller's details. Secure your transaction with our notarized bill of sale template. Download a simple bill of sale form in Pennsylvania, to be customized as per your need. Download a simple bill of sale form in Pennsylvania, to be customized as per your need. While it is not required to use a Bill of Sale to sell or buy a vehicle, it is highly recommended and may help you a void any ownership disputes in the future. When exchanging vehicles in the state of Pennsylvania, buyers and sellers should sign a bill of sale to prevent future legal disputes. This form is used to obtain a Pennsylvania Certificate of Title for vehicles not currently titled in Pennsylvania, or which were repossessed (1.