diff --git a/timesheet/inc/class.timesheet_bo.inc.php b/timesheet/inc/class.timesheet_bo.inc.php
index 31a4849a21..86feafcbc7 100644
--- a/timesheet/inc/class.timesheet_bo.inc.php
+++ b/timesheet/inc/class.timesheet_bo.inc.php
@@ -5,7 +5,7 @@
  * @link http://www.egroupware.org
  * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
  * @package timesheet
- * @copyright (c) 2005-11 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
+ * @copyright (c) 2005-13 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  * @version $Id$
  */
@@ -695,6 +695,32 @@ class timesheet_bo extends so_sql_cf
 		return $ret;
 	}
 
+	/**
+	 * delete / move all timesheets of a given user
+	 *
+	 * @param array $data
+	 * @param int $data['account_id'] owner to change
+	 * @param int $data['new_owner']  new owner or 0 for delete
+	 */
+	function deleteaccount($data)
+	{
+		$account_id = $data['account_id'];
+		$new_owner =  $data['new_owner'];
+
+		if (!$new_owner)
+		{
+			egw_link::unlink(0, TIMESHEET_APP, '', $account_id);
+			parent::delete(array('ts_owner' => $account_id));
+		}
+		else
+		{
+			$this->db->update($this->table_name, array(
+				'ts_owner' => $new_owner,
+			), array(
+				'ts_owner' => $account_id,
+			), __LINE__, __FILE__);
+		}
+	}
 
 	/**
 	 * set a status for timesheet entry identified by $keys
diff --git a/timesheet/setup/setup.inc.php b/timesheet/setup/setup.inc.php
index 861ad3b17b..4f0efa20cf 100644
--- a/timesheet/setup/setup.inc.php
+++ b/timesheet/setup/setup.inc.php
@@ -6,7 +6,7 @@
  * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
  * @package timesheet
  * @subpackage setup
- * @copyright (c) 2005-10 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
+ * @copyright (c) 2005-13 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  * @version $Id$
  */
@@ -32,7 +32,7 @@ $setup_info[TIMESHEET_APP]['description'] =
 'Tracking times and other activities for the Projectmanager.';
 $setup_info[TIMESHEET_APP]['note'] =
 'The TimeSheet application is sponsored by:<ul>
-<li> <a href="http://www.stylite.de" target="_blank">Stylite GmbH</a></li>
+<li> <a href="http://www.stylite.de" target="_blank">Stylite AG</a></li>
 <li> <a href="http://www.outdoor-training.de" target="_blank">Outdoor Unlimited Training GmbH</a></li>
 </ul>';
 
@@ -43,6 +43,7 @@ $setup_info[TIMESHEET_APP]['hooks']['admin'] = 'timesheet_hooks::all_hooks';
 $setup_info[TIMESHEET_APP]['hooks']['sidebox_menu'] = 'timesheet_hooks::all_hooks';
 $setup_info[TIMESHEET_APP]['hooks']['search_link'] = 'timesheet_hooks::search_link';
 $setup_info[TIMESHEET_APP]['hooks']['pm_cumulate'] = 'timesheet_hooks::cumulate';
+$setup_info[TIMESHEET_APP]['hooks']['deleteaccount'] = 'timesheet.timesheet_bo.deleteaccount';
 
 /* Dependencies for this app to work */
 $setup_info[TIMESHEET_APP]['depends'][] = array(