The buyer and seller should meet at a notary, tag service, or motor vehicle dealer to ensure the title application is completed correctly. A Pennsylvania vehicle bill of sale is a legal document formalizing the sale and purchase of a motor vehicle between a buyer and seller.This form is used to obtain a Pennsylvania Certificate of Title for vehicles not currently titled in Pennsylvania, or which were repossessed (1. A bill of sale is recommended if you're buying a motor vehicle, boat, or livestock. What Documentation Should I Receive When I Purchase a Used Car in PA? When buying a vehicle or equipment for your business, use this Vehicle and Equipment Purchase Agreement to protect yourself from unwarranted liabilities.