Good neighbor fence is true to some extent, but neighbor’s peace can be disturbed by a dispute over who really owns the fence. Conflicts often occur when it is time to repair or replace fences, or when new construction or new owners take place. Finding who owns the fence can take some time but is not a difficult process.
Get a survey. Especially if the property is newer, the county can have a recent survey on file. If not, call a licensed surveyor to have a property survey done.