diff --git a/doc/lfun/catch_tell b/doc/lfun/catch_tell
new file mode 100644
index 0000000..b64832b
--- /dev/null
+++ b/doc/lfun/catch_tell
@@ -0,0 +1,25 @@
+catch_tell()
+
+SYNOPSIS:
+	void catch_tell(string)
+
+DESCRIPTION:
+	When a message is sent to a noninteractive player, via say(),
+	tell_object, tell_room(), printf() or write(), it will get to the
+	function catch_tell(string). This will enable communications between
+	NPCs and from a player to an NPC.
+
+	Also, if an interactive object is being shadowed and the
+	shadow has catch_tell() defined, it will receive all output
+	that would otherwise be written to the user.
+
+	If a message is sent by an interactive object, catch_tell() is
+	not called in that object, to prevent recursive calls. Thus
+	catch_tell() in interactive objects can be used to filter the
+	output that goes to the users.
+
+	The efun shout() sends to interactive objects only.
+
+SEE ALSO:
+	enable_commands(E), say(E), tell_object(E), tell_room(E),
+	write(E), catch_msg(L)