A legal real estate contract must have the complete property description as stated in the documents at the County Recorder's Office in Illinois. Add the names, contact details, and addresses of the required parties.Provisions set forth in the agreement include pricing, financing, closing terms, inspections and surveys, property conditions, and more. A For Sale By Owner contract Illinois must include: 1. The Purchase Price, 2. Sellers are required to complete a property disclosure statement in which they respond to questions about the material condition of their home. Seller shall also furnish Purchaser with: (i) an Affidavit of Title in customary form; (ii) a Bill of. Learn about real estate purchase agreements and review tips for agents to protect buyers with well-prepared real estate contracts and negotiations.