A witness disobeying a subpoena also forfeits to the party aggrieved the sum of $100 and all damages that the person may sustain by the failure of the witness to attend. The forfeiture and damages may be recovered in a civil action.
Mont. Code Ann. § 26-2-105, under Subpoenas.
Mont. Code Ann. § 26-2-105
A witness disobeying a subpoena also forfeits to the party aggrieved the sum of $100 and all damages that the person may sustain by the failure of the witness to attend. The forfeiture and damages may be recovered in a civil action.