There shall be printed on each bill, or on a separate slip which shall be mailed with the bill:
The county treasurer shall ensure that only those taxing districts in which a parcel of property is located shall be listed on the bill for that property.
In all counties the statement shall also provide:
In all counties which do not classify property for purposes of taxation, for property on which a single family residence is situated the statement shall also include a statement to reflect the fair cash value determined for the property. In all counties which classify property for purposes of taxation in accordance with Section 4 of Article IX of the Illinois Constitution, for parcels of residential property in the lowest assessment classification the statement shall also include a statement to reflect the fair cash value determined for the property.
In all counties, the statement must include information that certain taxpayers may be eligible for tax exemptions, abatements, and other assistance programs and that, for more information, taxpayers should consult with the office of their township or county assessor and with the Department of Revenue. For bills mailed on or after January 1, 2026, the statement must include, in bold face type, a list of exemptions available to taxpayers and contact information for the chief county assessment officer.
In counties which use the estimated or accelerated billing methods, these statements shall only be provided with the final installment of taxes due. The provisions of this Section create a mandatory statutory duty. They are not merely directory or discretionary. The failure or neglect of the collector to mail the bill, or the failure of the taxpayer to receive the bill, shall not affect the validity of any tax, or the liability for the payment of any tax.
35 ILCS 200/20-15