This document discusses the legal liability of golf courses for errant golf balls that enter neighboring private properties. Golf courses may be found liable for nuisance or negligence in such situations. For nuisance, liability depends on the frequency of golf ball intrusions - over 200 balls per year generally establishes nuisance. Negligence requires a reasonable possibility of injury or damage from errant balls. Mitigation efforts by golf courses can reduce damages owed but not eliminate liability. Sanctions may include damages, injunctions, or closure in extreme cases. Communication and design changes are presented as alternatives to litigation.