@EFFect <exit> = Notify *<player>

Causes the exit's @osucc to be displayed to the specified player
whenever the exit is used, regardless of that player's location on the
MUD, but only if that player is connected.

There is no limit to the number of players who may be notified by
a given exit, but:

Unless the player setting the effect is a God, the player to be
notified must either be one's self, or a player who is not locked against
the player setting the effect.

Gods may set exits to notify any player.

see also: @effect, exits, @osucc