An Illinois Certificate of Mailing Notice by Publication is a legal document used to provide evidence of service in the state of Illinois. The certificate is used to prove that a notice of a legal action has been published in a newspaper in accordance with the rules of service by publication. There are two types of Certificate of Mailing Notice by Publication: the Notice of Publication and the Affidavit of Publication. The Notice of Publication is a document that is signed by the publisher of the newspaper and must include the date, title, and place of publication of the notice. It also must include the name of the person who was served by the notice. The Affidavit of Publication is a sworn statement from the publisher of the newspaper, attesting that the notice was published in the designated newspaper. It must include the same information as the Notice of Publication, as well as the dates of publication, the cost of publication, and the publisher’s signature. Both documents must be filed with the court to provide proof of service by publication.