020) since January 1, 1995. Hey Buddy Buck here!By law, most sellers of real property must provide a completed Seller Disclosure Statement (aka Form 17) to any buyer. The seller disclosure statement, also known as a seller disclosure form or Form17 is a crucial document that sellers must complete when selling their home. The Form 17 permits a seller to mark answers to the form questions as "Yes", "No", "I don't know", and "NA." A Legal MustHave: For most property sales in Washington, whipping out this form is as necessary as a front door on a house. Most sellers (with a few narrow exceptions) must complete and provide one to a buyer. Search for authorized WDFW license sales locations near you. Commercial licensing. If you are 18 or older, you do not need consent of a parent or guardian to get married.