Illinois Certificate of Mailing Notice By Publication is a legal document that is used to provide proof that notice of an action or proceeding has been published in a newspaper as required by law. It is typically used in situations where a defendant or respondent has not been located or served directly. The certificate is issued by the clerk of the court and includes the name of the newspaper, the date of publication, and the court's case number. There are two main types of Illinois Certificate of Mailing Notice By Publication: 1) Publication Notice by Mail and 2) Publication Notice by Publication in a Newspaper. Publication Notice by Mail is used when a party needs to serve notice to a defendant or respondent who is not located or served directly. It involves the court mailing a notice of the action or proceeding to the defendant or respondent’s last known address and then publishing a notice in a newspaper in the county where the action or proceeding is taking place. Publication Notice by Publication in a Newspaper is used when a defendant or respondent is not located or served directly and must be served by publication. It involves publishing a notice in a newspaper in the county where the action or proceeding is taking place.