[Dudits]

It IS supposed to be "u" because it DOES require his Name/ID.

PLUS: The problem is not here at all.
It does send the line after it

pawn Код:

format(message, sizeof(message), "Anti-WH: %s was checked for Weapon Hacks.", ReturnPlayerName(playerb));
        SendClientMessageToAll(COLOR_YELLOW, message);