Indiana Code Title 29. Probate § 29-1-1-19

Sec. 19. Any person legally competent who is required to be served with notice of any hearing in a probate proceeding may in person or by attorney waive in writing issuance and service of notice of the hearing.  A guardian of the estate or a guardian ad litem may make the waiver on behalf of a protected person.  A consul or other representative of a foreign government, whose appearance has been entered as provided by law on behalf of a person residing in a foreign country, may make a waiver of notice on behalf of the person.  Any person who submits to the jurisdiction of the court in any hearing shall be deemed to have waived notice.