In all cases where a personal representative, guardian, or conservator has been formally or informally appointed and has failed to qualify by filing the required bond and acceptance within 60 days of appointment, and nothing appears in the records of the court which may explain or excuse the delay, the appointment may be set aside by the court on its own motion with or without prior notice to interested persons. If prior notice is not given, the clerk shall promptly mail a copy of the order of the court to the petitioner or petitioner's attorney, and to the personal representative, guardian, or conservator.