Write 'Gift' on the selling price line, as this vehicle was a gift and FL doesn't collect tax on gifts. Find out what documents you will need to provide proof of sale and ownership if you are buying, selling, or gifting a vehicle.The seller and the buyer complete the bill of sale. A motor vehicle bill of sale is between a buyer and a seller of a car, truck, or motorcycle. It is signed as the last step in the sales process. Whether you're selling a car or buying cattle, this guide outlines everything you need to know on how to write a bill of sale. Facilitate a seamless car gifting process with our specialized tools. A bill of sale is a legal document that outlines the purchase of property between a buyer and seller. It commonly includes both parties' information. Fill out Section 6: Affidavit of Sale or Gift.