65 ILCS 5/9-3-36
Whenever there are sufficient funds in the hands of the treasurer after the payment of all interest due and to become due within 6 months, the treasurer shall on the first day of October of any year, or at any other time there are sufficient funds for that purpose on hand during the year, give notice by registered mail, addressed to the last registered holder of the bonds called at the address appearing upon his registry, that there are funds sufficient to pay the designated bonds and interest thereon to date 30 days hence from the date of such notice and directing presentation of such bonds for payment and cancellation, and the bonds shall cease to bear interest after the expiration of the 30 days and upon payment and cancellation of the bonds proper entry thereof shall be made upon the books of the treasurer. The treasurer, upon accumulation of sufficient funds, as herein provided, shall pay one or more bonds and shall call and pay such bonds, and any bondholder or holder of any interest coupon appertaining to any bond shall be entitled to summary relief by mandamus or injunction to enforce the provisions hereof. In addition to giving notice by registered mail to the last registered holder of such bonds, the treasurer shall cause to be published in a newspaper published and of general circulation in such municipality, if there is such a newspaper. If there is no such newspaper, the notice shall be given by posting in at least 3 places within the area designated as probably benefited by the improvement. Such notice shall be a notice of call and redemption addressed to all unknown bondholders specifying the number of the bonds called and designating the assessment against which the bonds have been issued, and indicating that interest will cease on the bonds 30 days from and after the date of publication of such notice, and thereafter the bonds shall cease to bear interest. Provisions as to redemption and call of the bonds shall be inserted in each of the bonds issued in accordance with the provisions of this Division 3.
65 ILCS 5/9-3-36