745 ILCS 10/8-103
If the notice under Section 8-102 is not served as provided therein, any such civil action commenced against a local public entity, or against any of its employees whose act or omission committed while acting in the scope of his employment as such employee caused the injury, shall be dismissed and the person to whom such cause of injury accrued shall be forever barred from further suing.
(from Ch. 85, par. 8-103)
(Source: Laws 1965, p. 2983.)