Stepping on or across the service line when serving while making contact with the ball
Failure to serve the ball over the net successfully
Ball-handling errors and contacting the ball illegally (double touching, lifting, carrying, throwing, etc.)
Touching the net with any part of the body while the ball is in play
Blocking a ball coming from the opponent's court and contacting the ball when reaching over the net if your opponent has not used 3 contacts AND has a player there to make a play on the ball
Attacking a ball coming from the opponent's court and contacting the ball when reaching over the net when the ball has not yet broken the vertical plane of the net
Crossing the court centerline with any part of your body, with the exception of a hand or foot. It is only considered a violation if the entire hand or entire foot crosses the court centerline
Serving out of rotation or out of order
Back row player blocking (deflecting a ball coming from the opponent) when, at the moment of contact, the back row player is near the net and has part of their body above the top of the net
Back row player attacking a ball inside the front zone (the area inside the 3M/10-foot line) when, at the moment of contact, the ball is completely above the net