Duty

From YPPedia

Greeter-only commands
/duty
/gmute
/greeter

The /duty command allows greeters to toggle their duty status. While off-duty, the greeter appears as yellow to all players, does not appear on the /who list for the greeters on the island, and does not receive any tells from greenies using the Talk to a Greeter button. If you are not eligible to be a greeter, you will be unable to use this command.

The /duty command also generates a "You are now on/off duty" message, to inform you of your current status.

Usage:
/duty (/du)