(1) Notice is: (a) actual whenever it consists of express information of a fact; (b) constructive whenever it is imputed by law. (2) Each person who has actual notice of circumstances sufficient to put a prudent person upon inquiry as to a particular fact has constructive notice of the fact itself in all cases in which, by prosecuting the inquiry, the person might have learned the facts.
Notice -- Actual And Constructive
Mont. Code Ann. § 1-1-217, under General Definitions of Terms Used in Code.
Mont. Code Ann. § 1-1-217