(1) A "seal" is a particular sign made to attest in the most formal manner the execution of an instrument. (2) A public seal in this state is a stamp or impression made by a public officer with an instrument provided by law to attest the execution of an official or public document. A private seal may be made in the same manner by any instrument.
Seal Defined
Mont. Code Ann. § 1-4-201, under Seals.
Mont. Code Ann. § 1-4-201