Idaho Code § 35-110: Survey of line.

The person building such fence, or the occupant or owner of the land whereon the same is built, may, upon notice to the other party, whenever doubts arise about the location of such fence, procure the services of a professional land surveyor to establish the boundary line between their respective lands, and the line so established is sufficient notice to the party making the mistake, so as to require him to remove such fence within one (1) year thereafter.