A player obstructs an opponent or invades an opponent's court. In play, a player standing in bounds or out of bounds contacts the shuttle with any part of their person or is struck on any part of their person by the shuttle. A serve may not be delivered until the receiver is ready. Some part of both feet of the server and the receiver must remain in contact with the court, inside the boundary lines, until the shuttle leaves the racket of the server. A serve which touches and passes over the net and falls within the diagonal service court and a shot during a rally which touches and passes over the net and falls within the legal boundary lines are both good.
Shuttles falling on the lines are in bounds.
It is not a fault if the server completely misses the shuttle on the serve.