Mont. Code Ann. § 27-26-403

In all cases where the respondent is a state, county, or municipal officer, all damages and costs, or either, which may be recovered or awarded shall be recovered and awarded against the state, county, or municipal corporation represented by such officer and not against such officer so appearing in said proceeding. The same shall be a proper claim against the state or county or municipal corporation for which such officer shall have appeared and shall be paid as other claims against the state, county, or municipality are paid; but in all such cases, the court shall first determine that the officer appeared and made defense in such proceeding in good faith.