Mont. Code Ann. § 72-3-211
Informal probate -- notice requirements
72-3-211 . Informal probate -- notice requirements. (1) The moving party shall give notice, as described by 72-1-301 , of the application for informal probate:
(a) to any person demanding it pursuant to 72-3-106 ; and
(b) to any personal representative of the decedent whose appointment has not been terminated.
(2) No other notice of informal probate is required.