A Pennsylvania Trailer Bill of Sale is a critical document that can help protect your legal rights. A Pennsylvania vehicle bill of sale is a legal document formalizing the sale and purchase of a motor vehicle between a buyer and seller.The buyer and seller should meet at a notary, tag service, or motor vehicle dealer to ensure the title application is completed correctly. Learn about bills of sale in Pennsylvania for vehicles, firearms, animals, etc. The Pennsylvania bill of sale form acknowledges the transfer of possession of a piece of personal property for an agreedupon sum of money. A Pennsylvania bill of sale documents the transfer of ownership of a motor vehicle, boat, gun, or other valuable asset. 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. NOTE: Individuals should list their PA Driver's. Learn how to sell a travel trailer in Texas with our comprehensive RV Bill of Sale guide.