Section 65 ILCS 5/11-31-2.1 - Appointment of receiver(a) If a municipality petitions for appointment of a receiver pursuant to Section 11-31-2 of this Act and it clearly appears from specific facts shown by affidavit or by verified petition or verified complaint that immediate and irreparable injury, loss or damage will result before personal service can practicably be had, a receiver may be appointed upon a showing that the municipality attempted to give notice by any means practicable and reasonably calculated to give actual notice under the circumstances, including by telephone to the defendant's last known phone number or by mailing to the defendant's last known address. If a receiver is appointed pursuant to this subsection, another hearing shall be set at the earliest practicable date.(b) Within 10 days after the appointment of a receiver pursuant to subsection (a) of this Section, the municipality shall attempt to obtain personal service, but if unable to obtain personal service and a summons duly issued in such action is returned without service stating that service cannot be obtained, then the municipality, its agent or attorney, may file an affidavit stating that the defendant is not a resident of this State or has departed from 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 also stating the place of residence of the defendant, if known, or if not, that upon diligent inquiry affiant has not been able to ascertain the defendant's place of residence, and the defendant may be notified by mailing to the defendant's last known address and posting at the real estate in receivership, or by such mailing and by publication pursuant to Section 2-206 of the Code of Civil Procedure. In cases where a defendant is notified by mailing and posting or by mailing and publication and the defendant does not appear generally, the court may not enter a personal judgment against the defendant, but may continue the receivership and authorize the issuance of receiver's certificates to become liens upon the real estate, as provided in Section 11-31-2 of this Act.(c) For purposes of notice by mail to owners as provided in Section 11-31-2.1, if the municipality in which the real estate subject to receivership is located has an owner registration ordinance, mailing to the addresses of unserved owners at the addresses registered with the municipality pursuant to the ordinance shall be sufficient. Notice shall be deemed provided 4 days after mailing. The notice shall state the caption and case number of the action, the address of the affected real estate, the fact that a receiver may be or has been appointed, the possibility that a lien may be filed against the real estate as a result of the appointment, and the date, time and place of the next court hearing on the matter.