820 ILCS 405/1200
No fee shall be charged any claimant in any proceeding under this Act by the Director or his representatives, or by the Referees or Board of Review, or by any court or the clerks thereof except as provided herein.
Any individual claiming benefits in any proceeding before the Director or his representative, or the Referee or the Board of Review, or his or its representatives, or a court, may be represented by counsel or other duly authorized agent; but no such counsel or agents shall either charge or receive for such services more than an amount approved by the Board of Review or, in cases arising under Section 604, by the Director.
After reasonable notice and a hearing before the Department's representative, any attorney found to be in violation of any provision of this Section shall be required to make restitution of any excess fees charged plus interest at a reasonable rate as determined by the Department's representative.
820 ILCS 405/1200