By law, most sellers of real property must provide a completed Seller Disclosure Statement (aka Form 17) to any buyer. The Seller Disclosure Statement in Washington (aka Form 17) is a mandatory form all sellers must complete and give to their buyers.You, as the Seller of the property, are required to provide this document within 7 days of an accepted contract between you and the Buyer. I am An Heir, Does A Personal Representative Need To Submit A Seller Disclosure Form 17 On The Sale Of Real Property? I'll focus on the one issue that seems to confuse Realtors more than any other issue in the Form 17 Seller Disclosure Law. Does the owner of a manufactured home that sits on leased land have to fill out Form 17 in Washington State? Proceedings arising out of this Agreement shall be exclusively in King County, Washington. The Broward County Clerk of Court accepts passport applications on behalf of the U.S. Department of State.