An anti-theft device for a golf club having a cover comprising an internal surface adapted to conform to a golf club hosel and a portion of a golf club shaft. One or more sensors are disposed within the internal surface of the cover and adapted to actuate between a passive state and an alarm alert state. An alarm is coupled to the one or more sensors, the alarm emitting a signal when the one or more sensors are actuated from the passive state to the alarm alert state. The one or more sensors are retracted in the passive state when the golf club hosel is housed within the cover. The one or more sensors are advanced in the alarm alert state when the golf club hosel is removed from the cover.