Montana Title 1. General Laws and Definitions § 1-5-303. Facts that must be shown when offering proof of handwriting

(1) the existence of one or more of the conditions mentioned in 1-5-302;

(2) that the witness testifying knew the person whose name purports to be subscribed to the instrument as a party and is well acquainted with that person's signature;

(3) that the witness testifying personally knew the person who subscribed the instrument as a witness and is well acquainted with that person's signature;

(4) that the signature or signatures in question are genuine; and

(5) the place of residence of the witness.