622.94  Proof of serving or posting notices.
  The posting up or service of any notice or other paper required by law may be proved by the affidavit of any competent witness attached to a copy of said notice or paper, and made within six months of the time of such posting up.
[C51, §2428; R60, §4043; C73, §3698; C97, §4681; C24, 27, 31, 35, 39, §11350; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §622.94]