To indicate that the service is a fault. See Rules 4.4.3 and 4.4.4.

To indicate that the service is a foot-fault. See Rule 4.4.1.

To indicate that the player did not strike the ball in accordance with the Rules. (see definitions in Appendix 2).

To indicate that an otherwise good service or return has struck the floor before reaching the front wall or has struck the board or tin. (See Definition in Appendix 2).

To indicate that an otherwise good srvice or return has gone out. (see definitions in Appendix 2).

To indicate that the server has become the receiver, i.e., a change of server has occurred. (see definitions in Appendix 2).

To stop play as appropriate when the referee has failed to do so and other calls are not relevant.

An example of the score. The server's score is always called first, thus in this example the server leads by four points to three. If points are equal the wording used is "all" (e.g. "love-all").

To indicate that the game in progress is to be played to nine points after the score has reached 8-all (called once only in any game).

To indicate that the game in progress is to be played to ten points after the score has reached 8-all (called once only in any game).

To indicate each time it occurs that the server requires one point to win the game in progress. See Definitions "GAME BALL".

To indicate each time it occurs that the server requires one point to win the match. See Definitions “MATCH BALL”.

Repeating the Referee's decision that a rally is to be replayed.

Repeating the Referee's decision to award a stroke to that player or team.

Repeating the Referee's decision that an appeal for a let is disallowed.