Before making the endorsements as above provided, an affidavit shall be filed with the clerk by one of the owners of such judgment, or one of such personal representatives or heirs, or their attorney, of the death of such owners as are dead, and that the persons named as such are the personal representatives or heirs, and in the case of personal representatives they shall file with the clerk a certificate of their qualification, unless their appointment is by the court from which the execution issues, in which case the record of such appointment shall be sufficient evidence of the fact.
Iowa Code § 626.105