Idaho Code § 9-324
There must be attached to the transcript a certificate of the justice that the transcript is in all respects correct, and that he had jurisdiction of the action, and also a further certificate of the clerk or prothonotary of the county in which the justice resided at the time of rendering the judgment, under seal of the county, or the seal of the court of common pleas, or county court, or court of general jurisdiction thereof, certifying that the person subscribing the transcript was, at the date of the judgment, a justice of the peace in the county, and that the signature is genuine. Such judgment, proceedings and jurisdiction may also be proved by the justice himself, on the production of his docket, or by a copy of the judgment, and his oral examination as a witness.
Idaho Code § 9-324