Mont. Code Ann. § 18-2-207

In a suit or action brought against the surety, payor, or other person liable on the security by a person or corporation to recover for any of the items specified in this part, the prevailing party is entitled to recover, in addition to all other costs, attorney fees in a sum that the court finds reasonable. However, attorney fees may not be allowed in a suit or action brought or instituted before the expiration of 30 days following the date of filing of the notice required in 18-2-206.