Mont. Code Ann. § 3-1-405

The certificate of proof or acknowledgment made before a justice of the peace, when used in any county other than that in which the justice resides, must be accompanied by a certificate, under the hand and seal of the clerk and recorder of the county in which the justice resides, setting forth that the justice, at the time of taking the proof or acknowledgment, was authorized to take the proof or acknowledgment and that the clerk and recorder is acquainted with the justice's handwriting and believes that the signature to the original certificate is genuine.