The Illinois Certificate Of Mailing Of Notice Of Hearing is a document that is used to certify that a notice of hearing has been sent by mail to a party or parties involved in a legal proceeding. It is often used in family law proceedings to ensure that all parties are informed of the date, time, and location of a scheduled hearing. There are two types of Illinois Certificate Of Mailing Of Notice Of Hearing — the Certificate Of Mailing Of Notice Of Hearing and the Certificate Of Service Of Notice Of Hearing. The Certificate Of Mailing Of Notice Of Hearing is used to certify that a notice of hearing has been mailed to the party or parties involved in the legal proceeding. The Certificate Of Service Of Notice Of Hearing is used to certify that a notice of hearing has been served in person to the party or parties involved in the legal proceeding.