65 ILCS 5/9-2-66
A municipality may file a petition in the circuit court praying for the entry of an order authorizing the municipality to sell and assign special assessment liens. Any number of properties and special assessment liens may be included in a petition. Notice of the filing of the petition and notice of the time and place of hearing on the petition shall be given by the municipality to "Owners of the lots or tracts of land on which such special assessments are liens" and to "Owners and holders of special assessment bonds and vouchers" by publication in conformity with the provisions of "An Act to Revise the Law in Relation to Notices", approved February 13, 1874, as heretofore and hereafter amended. The municipality shall also, within 10 days of the first publication of the notice, send a copy thereof by mail addressed to each known owner and holder of special assessment bonds and vouchers whose addresses are shown on the books and records of the municipality. The municipality shall also, within 10 days of the first publication of the notice, send a copy thereof by mail addressed to each owner of lots or tracts of land on which the special assessment is a lien and to a representative number of owners of lots or tracts of land on which the special assessments have been paid, whose names and addresses appear in the owner's column on the county collector's warrant for general taxes for the year preceding the filing of the petition. A certificate of the collector of special assessments of the municipality that he has sent copies in pursuance of this section is evidence that he has done so. Except as otherwise provided in this section and Sections 9-2-67 through 9-2-71, the practice and procedure shall be the same as in other civil cases.
65 ILCS 5/9-2-66