The notice may be served on anyone upon whom an original notice may be served in civil cases. Service may be made by any person, who shall make return verified by affidavit upon a copy of the notice, showing the date and place of service and upon whom served; but no special form of the return of service of the notice shall be required. It shall be sufficient if the facts therefrom can be reasonably ascertained. The return of service may be amended at any time.
Iowa Code § 85.25
Service of notice, R.C.P. 1.305, 1.306