A Pennsylvania vehicle bill of sale is a legal document formalizing the sale and purchase of a motor vehicle between a buyer and seller. Pennsylvania Trailer Bill of Sale Sample.The Pennsylvania bill of sale form acknowledges the transfer of possession of a piece of personal property for an agreedupon sum of money. The buyer and seller should meet at a notary, tag service, or motor vehicle dealer to ensure the title application is completed correctly. Utilize our Trailer Bill of Sale to document the sale of a trailer, ensuring protection for both the buyer and the seller. To make sure your trailer sale or purchase is legally solid, click the button below to fill out the Pennsylvania Trailer Bill of Sale form accurately. Dated this ______ day of. ,. The buyer and seller should input their personal information and present identification to one another. Enter trailer details: Fill out the trailer's make, model, year, and Vehicle Identification Number (VIN). Gather Vehicle Documents.