40 ILCS 5/3-144.1

All pensions, refunds or disability pension benefits granted under this Article, and every portion thereof, shall be exempt from attachment or garnishment process and shall not be seized, taken, subjected to, detained or levied upon by virtue of any judgment, or any process or proceedings whatsoever issued out of or by any court for the payment and satisfaction in whole or in part of any debt, damage, claim, demand or judgment against a pensioner, refund applicant or other beneficiary hereunder.