Is someone else using your land? Depending where you live, It could be as minor as letting pets wander where they shouldn’t, kids playing a little too far from their own home or a fence crossing over the border. In rural or large lots, it could be something more egregious, such as hunting or even a building that crosses your property line.
Property disputes are common in Texas and, depending on the violation and the personalities involved, they can require different levels of resolution. Sometimes talking it out or reaching a compromise will do. Other situations require legal action.