765 ILCS 750/29: Nondisclosure violation penalty.

A landlord who, in violation of Section 27, discloses that a tenant has exercised his or her rights under the Act, or discloses any information provided by the tenant in exercising those rights, shall be liable for actual damages up to $2,000 resulting from the disclosure. A tenant who successfully brings an action pursuant to this Section may be awarded reasonable attorney's fees and costs.