735 ILCS 5/2-206
2021 Illinois Compiled Statutes|Chapter 735 - CIVIL PROCEDURE|735 ILCS 5/ - Code of Civil Procedure.|Article II - Civil Practice

 (from Ch. 110, par. 2-206)Sec. 2-206. Service by publication; affidavit; mailing;  certificate.(a) Whenever, in any action affecting property or status within the  jurisdiction of the court, including an action to obtain the specific  performance, reformation, or rescission of a contract for the conveyance  of land, except for an action brought under Part 15 of Article XV of this Code that is subject to subsection (a-5), the plaintiff or his or her  attorney shall file, at the office of the clerk of the court in which  the action is pending, an affidavit showing that the defendant resides  or has gone out of this State, or on due inquiry cannot be found, or is  concealed within this State, so that process cannot be served upon him or her,  and stating the place of residence of the defendant, if known, or that  upon diligent inquiry his or her place of residence cannot be ascertained, the  clerk shall cause publication to be made in some newspaper published in  the county in which the action is pending.  If there is no newspaper  published in that county, then the publication shall be in a newspaper  published in an adjoining county in this State, having a circulation in  the county in which action is pending.  The publication shall contain  notice of the pendency of the action, the title of the court, the title  of the case, showing the names of the first named plaintiff and the  first named defendant, the number of the case, the names of the parties  to be served by publication, and the date on or after which default may  be entered against such party.  The clerk shall also, within 10 days of the  first publication of the notice, send a copy thereof by mail, addressed  to each defendant whose place of residence is stated in such affidavit.  The certificate of the clerk that he or she has sent the copy in pursuance of  this Section is evidence that he or she has done so.(a-5) If, in any action brought under Part 15 of Article XV of this Code, the plaintiff, or his or her attorney, shall file, at the office of the clerk of the court in which the action is pending, an affidavit showing that the defendant resides outside of or has left this State, or on due inquiry cannot be found, or is concealed within this State so that process cannot be served upon him or her, and stating the place of residence of the defendant, if known, or that upon diligent inquiry his or her place of residence cannot be ascertained, the plaintiff, or his or her attorney, shall cause publication to be made in some newspaper published in the county in which the action is pending. If there is no newspaper published in that county, then the publication shall be in a newspaper published in an adjoining county in this State, having a circulation in the county in which action is pending. The publication shall contain notice of the pendency of the action, the title of the court, the title of the case, showing the names of the first named plaintiff and the first named defendant, the number of the case, the names of the parties to be served by publication, and the date on or after which default may be entered against such party. It shall be the non-delegable duty of the plaintiff, or his or her attorney, within 10 days of the first publication of the notice, to send a copy thereof by mail, addressed to each defendant whose place of residence is stated in such affidavit. The certificate of the plaintiff, or his or her attorney, that he or she has sent the copy in pursuance of this Section is evidence that he or she has done so. A copy of the certificate shall be filed at the office of the clerk of the court where the action is pending.(b) In any action brought by a unit of local government to cause the  demolition, repair, or enclosure of a dangerous and unsafe or uncompleted  or abandoned building, notice by publication under this Section may be  commenced during the time during which attempts are made to locate the  defendant for personal service.  In that case, the unit of local government  shall file with the clerk an affidavit stating that the action meets the  requirements of this subsection and that all required attempts are being  made to locate the defendant.  Upon the filing of the affidavit, the clerk  shall cause publication to be made under this Section.  Upon completing the  attempts to locate the defendant required by this Section, the municipality  shall file with the clerk an affidavit meeting the requirements of  subsection (a).  Service under this subsection shall not be deemed to have  been made until the affidavit is filed and service by publication in the  manner prescribed in subsection (a) is completed.  (Source: P.A. 101-539, eff. 1-1-20; 102-156, eff. 1-1-22; 102-558, eff. 8-20-21.)