Motor Vehicle, Mobile Home, Off- Highway or Vessel Description. Year. 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.This is the motor number or serial number required for identification purposes. How do I fill this out? 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. Calculate how much you can expect to pay in property taxes on your home in Alameda County, California. Compare your rate to the state and national average.