According to Duval County Ranch Co. V. Foster, what invalidates an agreement regarding boundaries?

The ruling in Duval County Ranch Co. V. Foster emphasizes that certain informal agreements concerning boundaries, such as parol agreements and those based on acquiescence, can be invalidated when they are made in error. This decision highlights the importance of clear and precise boundaries as foundational to property law and land ownership.

In this context, a parol agreement refers to an oral contract, while an acquiescence agreement might involve a situation where one party accepts the actions of another regarding property boundaries over time. When such agreements are reached by mistake, they lack the necessary legal foundation to be enforceable. This is crucial because the accurate representation and establishment of boundaries are essential in preventing disputes and ensuring fair ownership rights.

Other options, while they may lead to issues, do not directly address the invalidation of boundary agreements in the same context as the ruling does. For example, documentation errors or survey recording failures can cause confusions or complications but do not necessarily invalidate an agreement that was made between the parties. Similarly, a verbal confirmation alone doesn't carry the legal weight needed to formalize boundary changes without supporting evidence. Thus, the ruling reinforces that valid and enforceable boundary agreements must be based on accurate and correctly understood terms, rather than informal or erroneous agreements