35 ILCS 200/22-20
The sheriff or coroner serving notice under Section 22-15 shall endorse his or her return thereon and file it with the Clerk of the Circuit Court and it shall be a part of the court record. A private detective or a special process server appointed under Section 22-15 shall make his or her return by affidavit and shall file it with the Clerk of the Circuit Court, where it shall be a part of the court record. If a sheriff, private detective, special process server, or coroner to whom any notice is delivered for service, neglects or refuses to make the return, the purchaser or his or her assignee may petition the court to enter a rule requiring the sheriff, private detective, special process server, or coroner to make return of the notice on a day to be fixed by the court, or to show cause on that day why he or she should not be attached for contempt of the court. The purchaser or assignee shall cause a written notice of the rule to be served upon the sheriff, private detective, special process server, or coroner. If good and sufficient cause to excuse the sheriff, private detective, special process server, or coroner is not shown, the court shall adjudge him or her guilty of a contempt, and shall proceed to punish him as in other cases of contempt.
If the property is located in a municipality in a county with less than 3,000,000 inhabitants, the purchaser or his or her assignee shall also publish a notice as to the owner or party interested, in some newspaper published in the municipality. If the property is not in a municipality in a county with less than 3,000,000 inhabitants, or if no newspaper is published therein, or if the property is in a county with 3,000,000 or more inhabitants, the notice shall be published in some newspaper in the county. If no newspaper is published in the county, then the notice shall be published in the newspaper that is published nearest the county seat of the county in which the property is located. If the owners and parties interested in the property upon diligent inquiry are unknown to the purchaser or his or her assignee, the publication as to such owner or party interested, may be made to unknown owners or parties interested. Any notice by publication given under this Section shall be given 3 times at any time after filing a petition for tax deed, but not less than 3 months nor more than 6 months prior to the expiration of the period of redemption. The publication shall contain (a) notice of the filing of the petition for tax deed, (b) the date on which the petitioner intends to make application for an order on the petition that a tax deed issue, (c) a description of the property, (d) the date upon which the property was sold, (e) the taxes or special assessments for which it was sold and (f) the date on which the period of redemption will expire. The publication shall not include more than one property listed and sold in one description, except as provided in Section 21-90, and except that when more than one property is owned by one person, all of the parcels owned by that person may be included in one notice.
The changes to this Section made by Public Act 95-477 apply only to matters in which a petition for tax deed is filed on or after June 1, 2008(the effective date of Public Act 95-477) .
35 ILCS 200/22-20