A certificate of title is the proof of ownership to a motor vehicle in the state of Florida. Most vehicles are required to be titled.Keep copies of the bill of sale (FLHSMV recommends having it notarized), certificate of title or other type of transaction document showing it was sold. A Florida bill of sale is a document used to transfer the ownership of personal property from a seller to a buyer. Motor Vehicle, Mobile Home, Off- Highway or Vessel Description. Year. All invoices must include the vendor name and remit to address as it appears in FAMIS. Learn about Florida Bill of Sale requirements. Get forms and templates to document the sale of items such as cars, boats, horses, firearms, and more.