For more information, contact customer service at 360.902.3770. Forms are available online at dol.wa.Access bill of sale form templates and learn how to transfer ownership of vehicles, boats, firearms, and other high-value personal items in Washington. The document contains the parties' information, the vehicle's specifics, and the sale price. The Washington bill of sale form actively commemorates the exchange of a piece of personal property for a dollar amount via a written contract. Gov or at any vehicle licensing office. Create a Washington bill of sale to document the transfer of ownership for vehicles or other personal property. The forms include a property description, purchase price, date of sale, and other terms of the transaction. A Washington bill of sale serves as proof that a buyer purchased someone else's personal property for an agreedupon price. A Washington bill of sale serves as proof that a buyer purchased someone else's personal property for an agreedupon price.