Indiana Code Title 29. Probate § 29-1-1-10

Sec. 10. Where, pursuant to law, order of court, or the request of the moving party, notice of the filing of any report, account, claim, petition, motion or other pleading to interested persons is required before submission of the same to the court, any interested person, on or before the day set for hearing, may file written objections or answers thereto, and, upon special order or general rule of the court, objections or answers thereto must be filed in writing as a prerequisite of being heard by the court.