Sec. 12.
Proof of publication and service may be made by affidavit of any person having knowledge of the facts. Such proof shall be filed with the court on or before the day of hearing, and thereupon the court shall have jurisdiction of the subject matter involved in the proceedings and of the parties interested therein.
History: 1925, Act 352, Imd. Eff. May 27, 1925 ;-- CL 1929, 3895 ;-- Am. 1941, Act 279, Eff. Jan. 10, 1942 ;-- CL 1948, 213.182