No need to install software, just go to DocHub, and sign up instantly and for free. Use a Template: Consider starting with a FSBO contract template tailored to Washington state laws.Washington requires those selling FSBO to fill out and file many documents and forms. Our guide tells you everything to include. Selling your Washington State home yourself? The first step is the details. Scroll down to the bottom of this section to define the purchase price, offer date, expiration date, and closing date.