820 ILCS 405/1900.1: Privileged Communications.

All letters, reports, or communications of any kind, either oral or written, from an employer or his workers to each other, or to the Director or any of his agents, representatives, or employees, made in connection with the administration of this Act shall be absolutely privileged and shall not be the basis of any slander or libel suit in any court of this State unless they are false in fact and malicious in intent.