65 ILCS 5/9-3-46
Subsequent to the issuance of the certificate of sale and 30 days prior to the expiration of the period of redemption the purchaser or his assignee shall cause written notice of the date of the expiration of the period of redemption to be served on the occupant of the premises described in the certificate, if the premises are occupied and proof of such notice shall be made to the court. The purchaser or his assignee shall also cause notice to be published in at least one issue of some newspaper published and of general circulation in the municipality where the real estate is situated, if there is such newspaper. Otherwise such publication shall be made in some newspaper published and of general circulation in the county, addressed to "All Owners, Parties Concerned and Persons Interested", setting forth a description of the real estate sold and not then redeemed, the date of sale, the date of the expiration of the period of redemption, when and where application will be made for deed to be issued pursuant to the provisions of this Division 3, and the docket number of the foreclosure proceedings. Such notice shall be published subsequent to the issuance of the certificate of sale and at least 30 days prior to the date of the expiration of the period of redemption.
65 ILCS 5/9-3-46