Mont. Code Ann. § 32-1-531

32-1-531 . Notice to creditors of insolvent bank. (1) Except as provided in subsection (2), the department shall give notice by advertisement in a newspaper of general circulation in the town or city in which the bank is situated, if there is one, and, if not, then in some other newspaper published in this state, which the department shall designate, once a week for 2 successive weeks. The notice must call on all persons who have claims against the bank to present them to the department or its authorized agent at a place specified in the notice and to make sworn proof, in a form to be fixed by the department, within the time specified in the notice, not less than 90 days from the date of the first publication. A copy of the notice must be mailed to all persons whose names appear as creditors upon the books of the bank.

(2) If the federal deposit insurance corporation is appointed as the liquidating agent, the provisions of subsection (1) do not apply and notice to creditors must be given pursuant to federal law.