Illinois Statutes Chapter 30. Finance § 15/3. Copy and certificate of publication to be filed

§ 3. The publisher of the newspaper in which a copy of such statement is published shall, within ten days after the publication of such statement, file in the office of the county clerk a certificate of such publication with a printed copy of such statement attached, stating the number of times which the same shall have been published, and the dates of the first and last papers containing the same.