(735 ILCS 5/21-104) (from Ch. 110, par. 21-104)
    Sec. 21-104. Process and notice to persons outside this State.
    (a) Process in change of name proceedings shall be governed by this Code.
    (b) Notice in all change of name proceedings required for the exercise of jurisdiction over a person outside this State shall be given in a manner best calculated to give actual notice and shall be given in one of the following manners:
        (1) By personal delivery outside this State in the
manner prescribed for service of process within this State.
        (2) In the manner prescribed by the law of the place
in which the service is made for service of process in that place in an action in any of its courts of general jurisdiction.
        (3) By any form of mail addressed to the person to be
served and requesting a receipt.
        (4) As directed by the court if other means of
notification are ineffective.
    (c) Notice under this Section shall be served, mailed, or delivered at least 10 days before any hearing in this State.
    (d) Proof of service outside this State may be made by affidavit of the individual who made the service or in the manner prescribed by the law of this State, the order pursuant to which the service is made, or the law of the place in which the service is made. If service is made by mail, proof may be a receipt signed by the addressee or other evidence of delivery to the addressee.
(Source: P.A. 87-409.)