35 ILCS 200/22-90
If any city, village or incorporated town, interested in the collection of any special tax or assessment, acquires a certificate of purchase at a tax sale, it is not required to take out a deed, but may preserve its lien under the certificate of purchase, beyond the period of redemption, by recording the certificate of purchase or evidence thereof within 1 year from the expiration of the period of redemption or extended period of redemption, in the office of the recorder of the county in which the property is situated, or by presenting the certificate for registration in the manner provided by law, to the registrar of titles in the case of property registered under the Registered Titles (Torrens) Act. The recorded certificate of purchase or the evidence thereof shall contain language in substantially the following form:
STATE OF ....))SS COUNTY OF ...) The following described property was sold to the (here place name of city, village, or incorporated town), at a public sale for the nonpayment of special taxes or assessments in the above stated county, on (insert date), to-wit: (here place property description). The sale was for the delinquent special tax or assessment (here place the special assessment warrant number and installment). Unless payment or settlement is made at the office of (here place proper city, village or incorporated town officer), the municipality for which the above lien or liens were created may at any time after expiration of the period of redemption, sell and assign the certificate of purchase. Either the municipality or its assignee at any time after expiration of the period of redemption may file a complaint to foreclose or bring an action for the amount of the special tax or assessment due. Dated (insert date). ........................... (Proper Officer)
35 ILCS 200/22-90