Hey Buddy Buck here! Form 17 Seller Disclosures and the most commonly asked questions.We also go over the changes that took effect today. 020) since January 1, 1995. It discloses your first-hand knowledge about the property. It's about five or six pages long and it covers all the systems of the house. The current form is 6 pages long and includes most of the typical property issues requiring disclosure with a catchall question for anything left out. By law, most sellers of real property must provide a completed Seller Disclosure Statement (aka Form 17) to any buyer. The Form 17 permits a seller to mark answers to the form questions as "Yes", "No", "I don't know", and "NA." 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.