A person, including a guardian ad litem, conservator, or other fiduciary, may waive notice by a writing signed by the person or the person's attorney and filed in the proceeding. A person for whom a guardianship or other protective order is sought, a ward, or a protected person may not waive notice.
Waiver Of Notice
Mont. Code Ann. § 72-1-302, under Notices, Parties, and Representation Generally.
Mont. Code Ann. § 72-1-302