225 ILCS 454/15-25
Licensees shall treat all customers honestly and shall not negligently or knowingly give them false information. A licensee engaged by a seller client shall timely disclose to customers who are prospective buyers all latent material adverse facts pertaining to the physical condition of the property that are actually known by the licensee and that could not be discovered by a reasonably diligent inspection of the property by the customer. A licensee shall not be liable to a customer for providing false information to the customer if the false information was provided to the licensee by the licensee's client and the licensee did not have actual knowledge that the information was false. No cause of action shall arise on behalf of any person against a licensee for revealing information in compliance with this Section.
225 ILCS 454/15-25