Proof of the publication and service of such notice shall be filed with the clerk aforesaid on or before the day set for hearing.

[C97, §3307; S13, §3307; C24, 27, 31, 35, 39, §11904; C46, 50, 54, 58, 62, §634.4; C66, 71, 73, 75, 77, 79, 81, §633.513]