Mont. Code Ann. § 81-3-106

Between January 1 and June 30 in each rerecording year, the department shall publish, in at least one issue of at least one newspaper of general circulation in each county of this state in which a newspaper is published, a notice to the effect that the year is a year for rerecording marks and brands and that no mark or brand continues of record unless rerecorded. The department shall also mail to each person in whose name a mark or brand stands of record a similar notice addressed to the person at the person's post-office address as shown by the records in the department.