735 ILCS 5/5-106
Where any person has been permitted by any court to commence and prosecute or to defend an action as a poor person without the payment of costs and expenses, the clerk of the court and the sheriff shall each have a lien upon every claim, including every claim for unliquidated damages, asserted in such action by the party who has thus been permitted to sue or defend as a poor person, and upon the proceeds thereof, for the amount of all fees and charges, becoming due such officer under the provisions of Section 5-105 of this Act, and remaining unpaid. Of the existence of such lien the order of court permitting the party to proceed as a poor person shall be sufficient notice to all other parties in the cause, as well as to any insurer or other third party in anyway liable for payment of any such claim or portion thereof, who shall have been called upon to defend against the same or otherwise notified of the commencement of such action and the assertion of such claim.
On petition filed in the court in which the action has been commenced, the court shall, on not less than 5 days' notice to all parties concerned, adjudicate the rights of the petitioning officer or officers and enforce the lien or liens by all appropriate means.
735 ILCS 5/5-106