Which of the following easements does NOT require a written document?

An easement by necessity is unique among the types of easements mentioned because it is often implied by law rather than requiring a formal written agreement. This type of easement arises when a property owner needs access to their land, and that access exists only through a neighboring property. The law recognizes this necessity to ensure that the property can be used effectively, especially in situations where a landlocked parcel has no other means of access. As a result, the necessity easement does not require a written document to be considered valid, in contrast to other easements, which typically do need to be formally documented to establish rights.

In comparison, other types of easements, such as agreement, release, and merging easements, necessitate a written form to define the parties involved and the specific rights being granted or released, ensuring clarity and legality.