Selling a house without a realtor involves preparing prelisting, listing, disclosure, negotiation, and closing paperwork. Legal help can be beneficial.In Illinois, homeowners must tell potential buyers about any known problems with their house and give them a written disclosure statement. This FSBO paperwork is needed as soon as you accept an offer, so it's useful to have a purchase agreement onhand that you can fill out quickly. Curious about the paperwork for selling a house without a Realtor? A For Sale By Owner contract Illinois must include: 1. The Purchase Price, 2. In an FSBO transaction, it is your responsibility to draw up the contract. However, many people choose to hire a real estate lawyer to draw up the contract. Illinois requires those selling FSBO to fill out and file many documents and forms.