Index: share/html/SelfService/Display.html
===================================================================
--- share/html/SelfService/Display.html	(revision 5896)
+++ share/html/SelfService/Display.html	(working copy)
@@ -137,6 +137,12 @@
         $m->abort;
     }
 
+    my $skip_create = 0;
+    $m->callback( CallbackName => 'BeforeCreate', ARGSRef => \%ARGS, skip_create => \$skip_create, results => \@results );
+    if ( $skip_create ) {
+        $m->comp( 'Error.html', Why => join( "\n", @results ));
+        $m->abort;
+    }
 
     ( $Ticket, @results ) =
     CreateTicket( Attachments => $session{'Attachments'}, %ARGS, Status => 'new' );