diff --git a/application/controllers/api/frontend/v1/Documents.php b/application/controllers/api/frontend/v1/Documents.php
index ebd1b269b..2d2c410cf 100644
--- a/application/controllers/api/frontend/v1/Documents.php
+++ b/application/controllers/api/frontend/v1/Documents.php
@@ -152,7 +152,7 @@ class Documents extends FHCAPI_Controller
 	 * @param string				$xml
 	 * @param string				$xsl
 	 * @param string				$sign_user (optional)
-	 * 
+	 *
 	 * @return array with Akte data and export data
 	 */
 	private function _getAkteExportData($xml, $xsl, $sign_user = null)
@@ -235,7 +235,7 @@ class Documents extends FHCAPI_Controller
 			$student = current($this->getDataOrTerminateWithError($result));
 
 			$ss = $this->input->post_get('ss');
-			
+
 			if ($ss !== null) {
 				$this->load->model('crm/prestudentstatus_model', 'PrestudentstatusModel');
 				$result = $this->PrestudentstatusModel->getLastStatus($student->prestudent_id, $ss);
@@ -334,7 +334,7 @@ class Documents extends FHCAPI_Controller
 				$this->PrestudentModel->addJoin('public.tbl_studiengang', 'studiengang_kz', 'LEFT');
 				$result = $this->PrestudentModel->load($prestudent_id);
 				$prestudent = current($this->getDataOrTerminateWithError($result));
-				
+
 				$studiengang_kz = $prestudent->studiengang_kz;
 				$akteData['person_id'] = $prestudent->person_id;
 				$akteData['titel'] = mb_substr($xsl . "_" . $prestudent->kuerzel, 0, 64);
@@ -380,7 +380,7 @@ class Documents extends FHCAPI_Controller
 			// TODO: was bedeutet wenn keine berechtigung?
 			if (!$access_rights || !$access_rights->berechtigung)
 				return show_404();
-			
+
 			$allowed = false;
 			foreach ($access_rights->berechtigung as $access_right) {
 				if ($this->permissionlib->isBerechtigt($access_right)) {
@@ -454,11 +454,11 @@ class Documents extends FHCAPI_Controller
 
 		if (!$vorlage->archivierbar)
 			$this->terminateWithError($this->p->t("stv", "grades_error_archive"));
-		
+
 		if ($sign_user && !$vorlage->signierbar)
 			$this->terminateWithError($this->p->t("stv", "grades_error_sign"));
 
-		
+
 		$this->load->library('DocumentExportLib');
 
 		// XML Data
diff --git a/application/libraries/DocumentExportLib.php b/application/libraries/DocumentExportLib.php
index 595ac461a..a75047cf9 100644
--- a/application/libraries/DocumentExportLib.php
+++ b/application/libraries/DocumentExportLib.php
@@ -55,7 +55,7 @@ use SimpleXMLElement as SimpleXMLElement;
  * $doc->create($outputformat);
  * $doc->output(true);
  * $doc->close();
- * 
+ *
  * New:
  * $xml_data = $this->documentexportlib->getDataXML($data);
  * $images = [[
@@ -397,20 +397,24 @@ class DocumentExportLib
 		$vorlage_stg = current(getData($result));
 		foreach ($vorlage_stg as $k => $v)
 			$vorlage->$k = $v;
-		
+
+		if ($sign_user)
+		{
+			$this->addSignToData($xml_data);
+		}
+
 		$result = $this->create($temp_folder, $outputformat, $vorlage, $xml_data, $images);
 		if (isError($result))
 			return $result;
-		
+
 		$temp_filename = getData($result);
 
-		if ($sign_user) {
-			$this->addSignToData($xml_data);
-
+		if ($sign_user)
+		{
 			$result = $this->sign($temp_folder, $temp_filename, $outputformat, $sign_user, $sign_profile);
 			if (isError($result))
 				return $result;
-			
+
 			$temp_filename = getData($result);
 		}
 
@@ -445,6 +449,7 @@ class DocumentExportLib
 		if ($xml_data->firstChild->tagName == 'error')
 			return error($xml_data->firstChild->textContent);
 
+		$styles_xsl = null;
 		// styles.xml erstellen
 		if ($vorlage->style) {
 			$styles_xsl = new DOMDocument();
@@ -461,7 +466,7 @@ class DocumentExportLib
 		// Template holen
 		$vorlage_found = false;
 		$vorlage_filename = $vorlage->vorlage_kurzbz . ($vorlage->mimetype == 'application/vnd.oasis.opendocument.spreadsheet' ? '.ods' : '.odt');
-		
+
 		$aktive_addons = array_filter(array_map('trim', explode(";", ACTIVE_ADDONS)));
 		foreach($aktive_addons as $addon) {
 			$zipfile = DOC_ROOT . 'addons/' . $addon . '/system/vorlage_zip/' . $vorlage_filename;
@@ -652,7 +657,7 @@ class DocumentExportLib
 		foreach ($files as $file)
 			if (is_file($file))
 				unlink($file);
-		
+
 		chdir($source_folder);
 		rmdir($temp_folder);
 	}
@@ -703,12 +708,12 @@ class DocumentExportLib
 	{
 		if ($outputformat)
 			return $outputformat;
-		
+
 		if ($mimetype == 'application/vnd.oasis.opendocument.spreadsheet')
 			return 'ods';
 		if ($mimetype == 'application/vnd.oasis.opendocument.text')
 			return 'odt';
-		
+
 		return 'pdf';
 	}
 }