PDFWAC 308-65-020
Definitions.
(1) Bill of sale for acquiring vehicles. A bill of sale shall include the names and addresses of the seller and purchaser; a description of the vehicle or part being sold, including the make, model and identification or serial number; the date of sale; and the purchase price of the vehicle. Bills of sale are acceptable in lieu of title in the cases of:
(a) Vehicles from nontitle jurisdictions;
(b) When an insurance company or private owner has turned in the title to a vehicle previously destroyed as provided under WAC 308-56A-460; or
(c) For vehicles of the type to which titles are not issued.
(2) In the case of vehicle parts a bill of sale from the seller describing the specific part and giving the full name, address and verification of the seller's identity, plus date of sale. In addition, if a major component part is acquired the vehicle identification number from which it came must also be set forth on the bill of sale. A copy of each bill of sale shall be maintained on acquired parts for a period of three years.