No need to install software, just go to DocHub, and sign up instantly and for free. Here are 9 tips to draw a For Sale By Owner contract in Washington: 1.Write a Clear Title 2. A Washington purchase agreement documents the sale of a piece of real property for a specified financial figure. A Washington residential purchase agreement is used when making an offer to purchase real estate. The agreement initiates the negotiation process. You'll need to fill out or obtain at least 14 documents, including the purchase agreement, closing statement, and bill of sale. NAR provides resources for working with FSBOs, including a brochure you can purchase from the REALTOR® Store. FSBO sales are not an easy process. Washington requires those selling FSBO to fill out and file many documents and forms.