What factors determine mutual acquiescence in boundary by acquiescence cases? Wilkinson Family Farm v. Babcock Explained

The Utah Court of Appeals in Wilkinson Family Farm v. Babcock clarified essential elements for establishing boundary by acquiescence claims, particularly focusing on the critical requirement of mutual acquiescence in a boundary line.

Background and Facts
Wilkinson Family Farm and Babcock owned adjoining properties in Morgan County with a disputed five-acre parcel. For over twenty years, a “slant fence” separated the disputed area from Babcock’s property. However, Babcock’s predecessors built this fence exclusively for cattle containment, not to establish a boundary. Both parties knew the true boundary ran straight along the section line. Despite Wilkinson’s use of the disputed parcel for crops and cattle grazing, Babcock’s predecessors never objected to this use.

Key Legal Issues
The court addressed whether the trial court properly considered: (1) the fence’s original purpose when determining mutual acquiescence, and (2) the parties’ knowledge of the true boundary location. Wilkinson argued these factors were irrelevant under the boundary by acquiescence doctrine.

Court’s Analysis and Holding
The Court of Appeals affirmed, holding that both factors are properly considered. The court explained that mutual acquiescence requires both parties to acknowledge a line as the boundary between properties. A fence’s purpose is relevant because parties cannot acquiesce in a boundary they never intended to establish. Similarly, knowledge of the true boundary matters because “if there is no uncertainty as to the location of the true boundary line the parties may not, knowing where the true boundary line is, establish a boundary line by acquiescence at another place.”

Practice Implications
This decision reinforces that successful boundary by acquiescence claims require more than mere occupation and passive permission. Practitioners must establish that disputed markers were intended as boundaries, not installed for practical purposes like livestock control. Documentation showing uncertainty about true boundaries strengthens these claims, while evidence of both parties’ knowledge of actual property lines can defeat them.