Mont. Code Ann. § 33-2-1358

33-2-1358 . Claims of holders of void or voidable rights. (1) The claims of a creditor who has received or acquired a preference, lien, conveyance, transfer, assignment, or encumbrance voidable under this part may not be allowed unless the creditor surrenders the preference, lien, conveyance, transfer, assignment, or encumbrance. If the avoidance is effected by a proceeding in which a final judgment has been entered, the claim may not be allowed unless the money is paid or the property is delivered to the liquidator within 30 days from the date of the entering of the final judgment, except that the court having jurisdiction over the liquidation may allow further time if there is an appeal or other continuation of the proceeding.

(2) A claim allowable under subsection (1) by reason of the avoidance, whether voluntary or involuntary, or a preference, lien, conveyance, transfer, assignment, or encumbrance may be filed as an excused late filing under 33-2-1364 if filed within 30 days from the date of the avoidance or within the further time allowed by the court under subsection (1).