diff --git a/application/libraries/SignatureLib.php b/application/libraries/SignatureLib.php
index b8c4374a3..132545219 100644
--- a/application/libraries/SignatureLib.php
+++ b/application/libraries/SignatureLib.php
@@ -33,16 +33,13 @@ class SignatureLib
 	 */
 	public static function list($inputFileName)
 	{
-		// Generic error occurred
-		$resultList = 'Generic error occurred';
-
 		try
 		{
 			// Get the content of the given file
 			$inputFileContent = file_get_contents($inputFileName);
 			if ($inputFileContent === false) // if failed
 			{
-				$resultList = 'An error occurred while getting the content from: '.$inputFileName;
+				error_log('An error occurred while getting the content from: '.$inputFileName);
 			}
 			else
 			{
@@ -57,20 +54,22 @@ class SignatureLib
 		}
 		catch(\Httpful\Exception\ConnectionErrorException $cee) // Httpful exception
 		{
-			$resultList = $cee->getMessage();
+			error_log($cee->getMessage());
 		}
 		catch (Exception $e) // any other exception
 		{
-			$resultList = $e->getMessage();
+			error_log($e->getMessage());
 		}
 
 		// If the response is fine
-		if (isset($resultPost->body) && is_object($resultPost->body) && isset($resultPost->body->retval))
+		if (isset($resultPost->body) && is_object($resultPost->body)
+			&& isset($resultPost->body->retval) && is_array($resultPost->body->retval))
 		{
 			return $resultPost->body->retval;
 		}
 
-		return $resultList;
+		// Otherwise return a null as error
+		return null;
 	}
 }
 
diff --git a/cis/private/lehre/abgabe_lektor_details.php b/cis/private/lehre/abgabe_lektor_details.php
index a508de098..e1b47369d 100644
--- a/cis/private/lehre/abgabe_lektor_details.php
+++ b/cis/private/lehre/abgabe_lektor_details.php
@@ -37,6 +37,7 @@ require_once('../../../include/phrasen.class.php');
 require_once('../../../include/projektarbeit.class.php');
 require_once('../../../include/projektbetreuer.class.php');
 require_once('../../../include/sancho.inc.php');
+require_once('../../../application/libraries/SignatureLib.php');
 
 if (!$db = new basis_db())
 	$db=false;
@@ -642,7 +643,29 @@ $result=@$db->db_query($qry);
 		}
 		if(file_exists(PAABGABE_PATH.$row->paabgabe_id.'_'.$uid.'.pdf'))
 		{
-			$htmlstr .= "		<td><a href='".$_SERVER['PHP_SELF']."?id=".$row->paabgabe_id."&uid=$uid' target='_blank'><img src='../../../skin/images/pdf.ico' alt='PDF' title='".$p->t('abgabetool/abgegebeneDatei')."' border=0></a></td>";
+			$uploadedDocumentSigned = null;
+
+			// Check if the document is signed
+			$signList = SignatureLib::list(PAABGABE_PATH.$row->paabgabe_id.'_'.$uid.'.pdf');
+			if (is_array($signList) && count($signList) > 0)
+			{
+				// The document is signed
+			}
+			elseif ($signList === null)
+			{
+				$uploadedDocumentSigned = 'WARNING: signature server error';
+			}
+			else
+			{
+				$uploadedDocumentSigned = $p->t('abgabetool/uploadedDocumentNotSigned');
+			}
+
+			$htmlstr .= "		<td>
+							<a href='".$_SERVER['PHP_SELF']."?id=".$row->paabgabe_id."&uid=$uid' target='_blank'>
+								<img src='../../../skin/images/pdf.ico' alt='PDF' title='".$p->t('abgabetool/abgegebeneDatei')."' border=0>
+							</a>
+							".$uploadedDocumentSigned."
+						</td>";
 		}
 		else
 		{
diff --git a/cis/private/lehre/abgabe_student_details.php b/cis/private/lehre/abgabe_student_details.php
index 29d74ab66..b8a8f158e 100644
--- a/cis/private/lehre/abgabe_student_details.php
+++ b/cis/private/lehre/abgabe_student_details.php
@@ -36,6 +36,7 @@ require_once('../../../include/phrasen.class.php');
 require_once('../../../include/projektarbeit.class.php');
 require_once('../../../include/projektbetreuer.class.php');
 require_once('../../../include/sancho.inc.php');
+require_once('../../../application/libraries/SignatureLib.php');
 
 $anzeigesprache = getSprache();
 $p = new phrasen($anzeigesprache);
@@ -111,6 +112,7 @@ $titel = $projektarbeit_obj->titel;
 $person = new person();
 $person->load($bid);
 $betreuer = $person->titelpre.' '.$person->vorname.' '.$person->nachname.' '.$person->titelpost;
+$uploadedDocumentSigned = null;
 
 if($uid!=$user)
 {
@@ -286,15 +288,20 @@ if($command=="update" && $error!=true)
 					move_uploaded_file($_FILES['datei']['tmp_name'], PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf');
 					if(file_exists(PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf'))
 					{
-						exec('chmod 640 "'.PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf'.'"');
-
-						$qry="UPDATE campus.tbl_paabgabe SET
-							abgabedatum = now(),
-							updatevon = ".$db->db_add_param($user).",
-							updateamum = now()
-							WHERE paabgabe_id=".$db->db_add_param($paabgabe_id, FHC_INTEGER);
-						$result=$db->db_query($qry);
-						echo $p->t('global/dateiErfolgreichHochgeladen');
+						// Check if the document is signed
+						$signList = SignatureLib::list(PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf');
+						if (is_array($signList) && count($signList) > 0)
+						{
+							// The document is signed
+						}
+						elseif ($signList === null)
+						{
+							$uploadedDocumentSigned = 'WARNING: signature server error';
+						}
+						else
+						{
+							$uploadedDocumentSigned = $p->t('abgabetool/uploadedDocumentNotSigned');
+						}
 					}
 					else
 					{
@@ -311,6 +318,21 @@ if($command=="update" && $error!=true)
 					}
 					if(file_exists(PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf'))
 					{
+						// Check if the document is signed
+						$signList = SignatureLib::list(PAABGABE_PATH.$paabgabe_id.'_'.$uid.'.pdf');
+						if (is_array($signList) && count($signList) > 0)
+						{
+							// The document is signed
+						}
+						elseif ($signList === null)
+						{
+							$uploadedDocumentSigned = 'WARNING: signature server error';
+						}
+						else
+						{
+							$uploadedDocumentSigned = $p->t('abgabetool/uploadedDocumentNotSigned');
+						}
+
 						/*$qry="UPDATE campus.tbl_paabgabe SET
 							abgabedatum = now(),
 							updatevon = '".$user."',
@@ -339,6 +361,15 @@ if($command=="update" && $error!=true)
 								$htmlstr .= '<input type="hidden" name="betreuer" value="'.$db->convert_html_chars($betreuer).'">'."\n";
 								$htmlstr .= '<input type="hidden" name="bid" value="'.$db->convert_html_chars($bid).'">'."\n";
 								$htmlstr .= '<input type="hidden" name="command" value="add">'."\n";
+
+								// If there are info about the signed document
+								if ($uploadedDocumentSigned != null)
+								{
+									$htmlstr .= "<tr>\n";
+									$htmlstr .= "<td colspan='2'><b>".$uploadedDocumentSigned."</b></td>";
+									$htmlstr .= "</tr>\n";
+								}
+
 								$htmlstr .= "<tr>\n";
 								$htmlstr .= "<td><b>".$p->t('abgabetool/spracheDerArbeit').":</b></td><td>";
 								$sprache = @$db->db_query("SELECT sprache FROM public.tbl_sprache");
diff --git a/locale/de-AT/abgabetool.php b/locale/de-AT/abgabetool.php
index c4b17318b..6d1eb923f 100644
--- a/locale/de-AT/abgabetool.php
+++ b/locale/de-AT/abgabetool.php
@@ -91,4 +91,5 @@ $this->phrasen['abgabetool/projektbeurteilungDownload']='Projektbeurteilung heru
 $this->phrasen['abgabetool/projektbeurteilungErstDownload']='Erst-/Begutachter';
 $this->phrasen['abgabetool/projektbeurteilungZweitDownload']='Zweitbegutachter';
 $this->phrasen['abgabetool/fehlerErmittelnEndabgabeProjektarbeit']='Fehler beim Ermitteln des Enduplaods der Projektarbeit';
+$this->phrasen['abgabetool/uploadedDocumentNotSigned']='The uploaded document is not signed DE';
 ?>
diff --git a/locale/en-US/abgabetool.php b/locale/en-US/abgabetool.php
index b05456faa..c782dedcc 100644
--- a/locale/en-US/abgabetool.php
+++ b/locale/en-US/abgabetool.php
@@ -91,4 +91,5 @@ $this->phrasen['abgabetool/projektbeurteilungDownload']='Thesis-Assessment downl
 $this->phrasen['abgabetool/projektbeurteilungErstDownload']='First-/Assessor';
 $this->phrasen['abgabetool/projektbeurteilungZweitDownload']='Second Assessor';
 $this->phrasen['abgabetool/fehlerErmittelnEndabgabeProjektarbeit']='Error when getting endupload of project work';
+$this->phrasen['abgabetool/uploadedDocumentNotSigned']='The uploaded document is not signed EN';
 ?>