Mont. Code Ann. § 27-18-413

Personal property subject to a security interest may be taken on attachment issued at the suit of a creditor (other than the secured party) of the debtor under the security agreement; but before the property is taken, the officer levying the writ must pay or tender to the secured party the amount of the security agreement debt and interest or must deposit the same with the county treasurer of the county in which the financing statement covering the security agreement is filed if such statement is filed with a county clerk and recorder or, if such statement is filed with another filing officer pursuant to law, with such other filing officer, payable to the order of the secured party.