Can a person be liable for trespass if they are misinformed about property lines?

Liability for trespass generally exists when an individual intentionally enters or remains on another person's property without permission. The key point here is that intent is the primary factor in determining liability in a trespass action. Even if a person is misinformed about property lines, if they intentionally enter onto land that they know or should reasonably know is not theirs, they can still be held liable. The law does not usually provide a defense based on mistaken belief about property boundaries unless the entry was truly unintentional and the person had no reasonable way to know that they were trespassing.

In many jurisdictions, even a reasonable mistake about property boundaries will not negate liability, as trespass is an intentional tort, meaning the intent to enter the property typically suffices for liability, regardless of the person's belief about where the boundary lies. This underscores the principle that individuals are responsible for ensuring they have permission to enter upon land.