678.2  Affidavit.
  It must be shown by affidavit that the controversy is real, and that the proceeding is in good faith to determine the rights of the parties thereto.
[C51, §1844; R60, §3409; C73, §3409; C97, §4378; C24, 27, 31, 35, 39, §12687; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §678.2]