Mont. Code Ann. § 70-24-410

70-24-410 . Unlawful or unreasonable entry by landlord -- tenant's remedies. If the landlord makes an unlawful entry or a lawful entry in an unreasonable manner or makes repeated demands for entry otherwise lawful but which have the effect of unreasonably harassing the tenant, the tenant may either obtain injunctive relief to prevent the recurrence of the conduct or terminate the rental agreement. In either case the tenant may recover actual damages.