The term "conveyance", as used in 70-21-302 through 70-21-304, embraces every instrument in writing by which any estate or interest in real property is created, aliened, mortgaged, or encumbered or by which the title to real property may be affected, except wills.
Conveyance Defined
Mont. Code Ann. § 70-21-301, under Effect of Recording.
Mont. Code Ann. § 70-21-301