What is the term for the use of another person's property that is open, notorious, exclusive, and adverse to the true owner's interests?

The term that describes the use of another person's property in a manner that is open, notorious, exclusive, and adverse to the true owner's interests is commonly known as "squatter rights." This concept falls under the legal doctrine of adverse possession, which allows an individual to claim ownership of land under certain conditions if they have occupied it for a specific period without the permission of the actual owner.

For the use to qualify for adverse possession, the occupancy must be open (meaning the use is visible and obvious), notorious (the true owner is aware or should be aware of the use), exclusive (the squatter is not sharing possession with others), and adverse (the use is without permission). When these conditions are met, the squatter may potentially gain legal ownership of the property after the statutory period, depending on state laws.

In contrast, leasehold rights, tenant rights, and landlord rights refer to legal relationships and entitlements that arise from rental agreements and property management, rather than the unauthorized use of someone else's property. Therefore, they do not apply to the scenario described in the question.