Which doctrine can establish an agreed-to boundary when the true boundary line is uncertain?

The agreed-boundary doctrine is a legal principle that is used to resolve disputes over boundary lines when the true boundary is unclear or uncertain. This doctrine arises when adjacent property owners mutually agree on a boundary line that differs from what may be indicated by a survey or title documents. The key aspect of this doctrine is that it requires a mutual agreement between the parties involved, and once this agreement is established, it becomes binding.

This doctrine is particularly relevant in situations where circumstances such as ambiguous descriptions in deeds, historical changes in land use, or physical markers that are difficult to interpret lead to uncertainty about the actual boundary. By allowing neighbors to establish a definitive line through their agreement, the agreed-boundary doctrine promotes harmony and prevents ongoing disputes that could lead to costly litigation or further issues down the road.

In contrast, other doctrines and concepts mentioned, such as boundary by reference, the doctrine of necessity, and prescriptive easements, serve different legal purposes, such as defining boundaries based on specific historical reference points, allowing access to landlocked parcels, or establishing rights through continuous use over time, rather than focusing on agreements made by the parties involved in boundary disputes.