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.Enter total purchase price in Section I, including installation charges on contract sales of mobile homes. Wondering if anyone can help me with some information. I have read the PennDOT site and it's not exactly clear. The buyer needs to fill out Section D on the front of the title, including lien information if they are financing the vehicle. View the terms and conditions of the Allegheny Toyota website. If you have any comments or questions, contact us today.