diff --git a/application/helpers/hlp_common_helper.php b/application/helpers/hlp_common_helper.php
index 6a2675a04..a7eda8827 100644
--- a/application/helpers/hlp_common_helper.php
+++ b/application/helpers/hlp_common_helper.php
@@ -301,3 +301,45 @@ function isLogged()
 
 	return isset($ci->authlib) && $ci->authlib->getAuthObj() != null;
 }
+
+/**
+ * Konvertiert Problematische Sonderzeichen in Strings fuer
+ * Accountnamen und EMail-Aliase
+ *
+ * @param $str
+ * @return bereinigter String
+ */
+function sanitizeProblemChars($str)
+{
+	$enc = 'UTF-8';
+
+	$acentos = array(
+		'A' => '/À|Á|Â|Ã|Å/',
+		'Ae' => '/Ä/',
+		'a' => '/à|á|â|ã|å/',
+		'ae'=> '/ä/',
+		'C' => '/Ç/',
+		'c' => '/ç/',
+		'E' => '/È|É|Ê|Ë/',
+		'e' => '/è|é|ê|ë/',
+		'I' => '/Ì|Í|Î|Ï/',
+		'i' => '/ì|í|î|ï/',
+		'N' => '/Ñ/',
+		'n' => '/ñ/',
+		'O' => '/Ò|Ó|Ô|Õ/',
+		'Oe' => '/Ö/',
+		'o' => '/ò|ó|ô|õ/',
+		'oe' => '/ö/',
+		'U' => '/Ù|Ú|Û/',
+		'Ue' => '/Ü/',
+		'u' => '/ù|ú|û/',
+		'ue' => '/ü/',
+		'Y' => '/Ý/',
+		'y' => '/ý|ÿ/',
+		'a.' => '/ª/',
+		'o.' => '/º/',
+		'ss' => '/ß/'
+	);
+
+	return preg_replace($acentos, array_keys($acentos), htmlentities($str,ENT_NOQUOTES, $enc));
+}
diff --git a/application/models/person/Benutzer_model.php b/application/models/person/Benutzer_model.php
index 15bce56db..45edf5122 100644
--- a/application/models/person/Benutzer_model.php
+++ b/application/models/person/Benutzer_model.php
@@ -43,13 +43,13 @@ class Benutzer_model extends DB_Model
 		$this->addSelect('1');
 		$result = $this->loadWhere(array('alias' => $alias));
 
-		if (!isError($result))
+		if (isSuccess($result))
 		{
 			if (hasData($result))
 			{
 				$result = success(array(true));
 			}
-			else if (!hasData($result))
+			else
 			{
 				$result = success(array(false));
 			}
@@ -66,6 +66,7 @@ class Benutzer_model extends DB_Model
 	public function generateAlias($uid)
 	{
 		$aliasres = '';
+		$this->addLimit(1);
 		$this->addSelect('vorname, nachname');
 		$this->addJoin('public.tbl_person', 'person_id');
 		$nameresult = $this->loadWhere(array('uid' => $uid));
@@ -86,43 +87,13 @@ class Benutzer_model extends DB_Model
 	// Private methods
 
 	/**
-	 * Sanitizes a string used for alias. Replaces special characters, spaces, upper case.
+	 * Sanitizes a string used for alias. Replaces special characters, spaces, sets lower case.
 	 * @param string $str
 	 * @return string
 	 */
 	private function _sanitizeAliasName($str)
 	{
-		$enc = 'UTF-8';
-
-		$acentos = array(
-			'A' => '/À|Á|Â|Ã|Å/',
-			'Ae' => '/Ä/',
-			'a' => '/à|á|â|ã|å/',
-			'ae'=> '/ä/',
-			'C' => '/Ç/',
-			'c' => '/ç/',
-			'E' => '/È|É|Ê|Ë/',
-			'e' => '/è|é|ê|ë/',
-			'I' => '/Ì|Í|Î|Ï/',
-			'i' => '/ì|í|î|ï/',
-			'N' => '/Ñ/',
-			'n' => '/ñ/',
-			'O' => '/Ò|Ó|Ô|Õ/',
-			'Oe' => '/Ö/',
-			'o' => '/ò|ó|ô|õ/',
-			'oe' => '/ö/',
-			'U' => '/Ù|Ú|Û/',
-			'Ue' => '/Ü/',
-			'u' => '/ù|ú|û/',
-			'ue' => '/ü/',
-			'Y' => '/Ý/',
-			'y' => '/ý|ÿ/',
-			'a.' => '/ª/',
-			'o.' => '/º/',
-			'ss' => '/ß/',
-		);
-
-		$str = preg_replace($acentos, array_keys($acentos), htmlentities($str,ENT_NOQUOTES, $enc));
+		$str = sanitizeProblemChars($str);
 		return mb_strtolower(str_replace(' ','_', $str));
 	}
 }
diff --git a/application/models/ressource/Mitarbeiter_model.php b/application/models/ressource/Mitarbeiter_model.php
index 329cc3064..abf71e1b9 100644
--- a/application/models/ressource/Mitarbeiter_model.php
+++ b/application/models/ressource/Mitarbeiter_model.php
@@ -132,4 +132,67 @@ class Mitarbeiter_model extends DB_Model
 
 		return $this->execQuery($qry, $params);
 	}
+
+	/**
+	 * Checks if alias exists
+	 * @param $kurzbz
+	 */
+	public function kurzbzExists($kurzbz)
+	{
+		$this->addSelect('1');
+		$result = $this->loadWhere(array('kurzbz' => $kurzbz));
+
+		if (isSuccess($result))
+		{
+			if (hasData($result))
+			{
+				$result = success(array(true));
+			}
+			else
+			{
+				$result = success(array(false));
+			}
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Generates alias for a uid.
+	 * @param $uid
+	 * @return array the alias if newly generated
+	 */
+	public function generateKurzbz($uid)
+	{
+		$kurzbz = '';
+		$this->addLimit(1);
+		$this->addSelect('vorname, nachname');
+		$this->addJoin('public.tbl_benutzer', 'tbl_mitarbeiter.mitarbeiter_uid = tbl_benutzer.uid');
+		$this->addJoin('public.tbl_person', 'person_id');
+		$nameresult = $this->loadWhere(array('uid' => $uid));
+
+		if (hasData($nameresult))
+		{
+			$kurzbzdata = getData($nameresult);
+			$nachname_clean = sanitizeProblemChars($kurzbzdata[0]->nachname);
+			$vorname_clean = sanitizeProblemChars($kurzbzdata[0]->vorname);
+
+			for ($nn = 6, $vn = 2; $nn != 0; $nn--, $vn++)
+			{
+				$kurzbz = mb_substr($nachname_clean, 0, $nn);
+				$kurzbz .= mb_substr($vorname_clean, 0, $vn);
+
+				$kurzbzexists = $this->kurzbzExists($kurzbz);
+
+				if (hasData($kurzbzexists) && !getData($kurzbzexists)[0])
+					break;
+			}
+
+			$kurzbzexists = $this->kurzbzExists($kurzbz);
+
+			if (hasData($kurzbzexists) && getData($kurzbzexists)[0])
+				return error('No Kurzbezeichnung could be generated');
+		}
+		return success($kurzbz);
+	}
 }