The purchaser's signature in section 3 is optional. Use this car purchase agreement template to customize the financing information for your car along with other required details.Read this article to learn everything about drafting the Florida vehicle bill of sale and download our professional bill of sale template. A Florida bill of sale is a document used to transfer the ownership of personal property from a seller to a buyer. I'd like to take this time to review the sample contract with you to help you understand the ins and outs of a purchase contract.