15 ILCS 405/9.04
Whenever the Comptroller has been notified by the State Employees' Retirement System of Illinois of a claim for recovery of excess benefits paid which are recoverable from benefits payable under the Workers' Compensation Act or the Workers' Occupational Diseases Act, the Comptroller shall review all vouchers presented for payment of Workers' Compensation or Occupational Disease benefits to the injured party, and shall reject and notify the submitting agency of any such voucher which is subject to the recovery claim of the State Employees' Retirement System.
Upon receiving notification of the rejection of a voucher under this Section, the State agency shall reprocess the voucher to provide for (1) payment to the State Employees' Retirement System to satisfy its recovery claim, and (2) payment of any excess to the original payee. The State agency shall then promptly resubmit the reprocessed voucher to the Comptroller.
15 ILCS 405/9.04