This guide will walk you through the paperwork for selling a house without a Realtor and various other steps that can give you a leg up. Washington requires those selling FSBO to fill out and file many documents and forms.Several of these documents are legally binding agreements. Understand key disclosure requirements for sellers in Washington state and learn how to comply effectively. These forms are the legal documents the buyer and seller sign, putting the buyer's offer in writing and completing the transaction. Selling your home FSBO? There's no reason someone should get a percentage of the sale price just for filling out some forms. They aren't even complicated forms. Here you will find forms that are used statewide in Washington Courts. State law in Washington (2021 Revised Code of Washington § 64.06.