IT IS A FAULT
... when serving, it is considered a fault, when the shuttle:
- is caught in the net and remains suspended on the top after passing over the net, lands outside of the court is hit by the receiver's partner.
- lands outside of the court.
- passes through or under the net.
- touches any other object or person outside the court.
- is hit twice in succession by the same player.
- Touches a player's racket and does not travel towards the opponents court.
- touches the net or stands with their racket or clothing.
- invades an opponent's court under the net with the racket so that an opponent is obstructed or distracted.