diff --git a/application/models/organisation/Studiengang_model.php b/application/models/organisation/Studiengang_model.php
index 36e4b6992..a091c9059 100644
--- a/application/models/organisation/Studiengang_model.php
+++ b/application/models/organisation/Studiengang_model.php
@@ -182,8 +182,7 @@ class Studiengang_model extends DB_Model
 								(
 									SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 									  FROM public.tbl_organisationseinheit o
-									 WHERE o.oe_parent_kurzbz IS NULL
-									   AND o.oe_kurzbz = '.$this->escape($oe_kurzbz).'
+									 WHERE o.oe_kurzbz = '.$this->escape($oe_kurzbz).'
 								 UNION ALL
 									SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 									  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)
@@ -358,8 +357,7 @@ class Studiengang_model extends DB_Model
 					(
 						SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 						  FROM public.tbl_organisationseinheit o
-						 WHERE o.oe_parent_kurzbz IS NULL
-						   AND o.oe_kurzbz = '.$this->escape($oe_kurzbz).'
+						 WHERE o.oe_kurzbz = '.$this->escape($oe_kurzbz).'
 					 UNION ALL
 						SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 						  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)
diff --git a/application/models/system/Message_model.php b/application/models/system/Message_model.php
index b94bc3861..a99716022 100644
--- a/application/models/system/Message_model.php
+++ b/application/models/system/Message_model.php
@@ -72,8 +72,7 @@ class Message_model extends DB_Model
 							(
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o
-								 WHERE o.oe_parent_kurzbz IS NULL
-								   AND o.oe_kurzbz = ?
+								 WHERE o.oe_kurzbz = ?
 							 UNION ALL
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)
diff --git a/application/models/system/Recipient_model.php b/application/models/system/Recipient_model.php
index c0fa75da2..40ef39f65 100644
--- a/application/models/system/Recipient_model.php
+++ b/application/models/system/Recipient_model.php
@@ -146,8 +146,7 @@ class Recipient_model extends DB_Model
 							(
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o
-								 WHERE o.oe_parent_kurzbz IS NULL
-								   AND o.oe_kurzbz = ?
+								 WHERE o.oe_kurzbz = ?
 							 UNION ALL
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)
@@ -225,8 +224,7 @@ class Recipient_model extends DB_Model
 							(
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o
-								 WHERE o.oe_parent_kurzbz IS NULL
-								   AND o.oe_kurzbz = ?
+								 WHERE o.oe_kurzbz = ?
 							 UNION ALL
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)
@@ -346,8 +344,7 @@ class Recipient_model extends DB_Model
 							(
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o
-								 WHERE o.oe_parent_kurzbz IS NULL
-								   AND o.oe_kurzbz = ?
+								 WHERE o.oe_kurzbz = ?
 							 UNION ALL
 								SELECT o.oe_kurzbz, o.oe_parent_kurzbz
 								  FROM public.tbl_organisationseinheit o INNER JOIN organizations orgs ON (o.oe_parent_kurzbz = orgs._pk)