Iowa Code § 633.144: Mortgages and judgments.

Judgments rendered by any court in the state of Iowa and mortgages belonging to an estate, trust, or to a person under conservatorship may, without prior order of court, be released, discharged or assigned, in whole or in part as to any particular property, and deeds may be executed in performance of real estate contracts entered into before the creation of the estate, trust, or conservatorship, by any foreign fiduciary, receiver, referee, assignee or commissioner, or by any other person acting in a fiduciary capacity appointed by a court of record of any foreign state or country, where a statement is filed by said fiduciary that no fiduciary, receiver, referee, assignee, or commissioner has been appointed and qualified in this state. Such release, satisfaction, discharge, assignment or deed may be made without any order of court in any manner or by any instrument which would be valid and effective if made by a like officer qualified under the law of this state.