020) since January 1, 1995. By law, most sellers of real property must provide a completed Seller Disclosure Statement (aka Form 17) to any buyer.Almost every home seller in WA must complete a Seller Disclosure Statement, aka the Form 17. Learn more, and get a copy you can use for free! The Form 17 permits a seller to mark answers to the form questions as "Yes", "No", "I don't know", and "NA." Nearly all real estate sales in Washington State require a seller disclosure statement, also known as Form 17, to be given to the buyer. While tenants in rent regulated or government subsidized apartments have special rights, many rules and laws apply to both unregulated and regulated apartments. This booklet explains many of these laws you need to know and provides resources where you can find more information about landlord and tenant issues. Check if this is an amended return. Use the requisition form provided in the current computer system.