diff --git a/inc/inc.ClassNotificationService.php b/inc/inc.ClassNotificationService.php
index 583a2177a..c6847d2c8 100644
--- a/inc/inc.ClassNotificationService.php
+++ b/inc/inc.ClassNotificationService.php
@@ -147,8 +147,12 @@ class SeedDMS_NotificationService {
 
 	/**
 	 * This notification is sent when a review or approval is needed.
+	 * The method is only called by sendNewDocumentMail() and sendNewDocumentVersionMail().
+	 * It does not care about the current status of an approval or review, but
+	 * informs an reviewer and approver. Hence, it should only be called
+	 * right after a new document version was created.
 	 */
-	public function sendRequestRevAppActionMail($content, $user) { /* {{{ */
+	private function sendRequestRevAppActionMail($content, $user) { /* {{{ */
 		$document = $content->getDocument();
 		$folder = $document->getFolder();
 
@@ -200,6 +204,88 @@ class SeedDMS_NotificationService {
 		}
 	} /* }}} */
 
+	/**
+	 * This notification is sent when a review is needed.
+	 * In opposite to sendRequestRevAppActionMail() this method checks review status
+	 * and informs only those reviewers about a required review who have not
+	 * reviewed the document yet.
+	 */
+	public function sendReviewRequestMail($content, $user) { /* {{{ */
+		$document = $content->getDocument();
+		$dms = $document->getDMS();
+		$folder = $document->getFolder();
+
+		if($this->settings->_enableNotificationAppRev) {
+			$subject = "review_request_email_subject";
+			$message = "review_request_email_body";
+			$params = array();
+			$params['name'] = $document->getName();
+			$params['folder_path'] = $folder->getFolderPathPlain();
+			$params['version'] = $content->getVersion();
+			$params['comment'] = $document->getComment();
+			$params['username'] = $user->getFullName();
+			$params['url'] = getBaseUrl().$this->settings->_httpRoot."out/out.ViewDocument.php?documentid=".$document->getID()."&currenttab=revapp";
+			$params['sitename'] = $this->settings->_siteName;
+			$params['http_root'] = $this->settings->_httpRoot;
+
+			$reviewStatus = $content->getReviewStatus();
+			foreach($reviewStatus as $dastat) {
+				if ($dastat["status"] == 0) {
+					if ($dastat["type"] == 0) {
+
+						$reviewer = $dms->getUser($dastat["required"]);
+						$this->toIndividual($document->getOwner(), $reviewer, $subject, $message, $params, SeedDMS_NotificationService::RECV_REVIEWER);
+					} elseif ($dastat["type"] == 1) {
+					
+						$group = $dms->getGroup($dastat["required"]);
+						$this->toGroup($document->getOwner(), $group, $subject, $message, $params, SeedDMS_NotificationService::RECV_REVIEWER);
+					}
+				}
+			}
+		}
+	} /* }}} */
+
+	/**
+	 * This notification is sent when a review is needed.
+	 * In opposite to sendRequestRevAppActionMail() this method checks the approval status
+	 * and informs only those reviewers about a required approval who have not
+	 * approved the document yet.
+	 */
+	public function sendApprovalRequestMail($content, $user) { /* {{{ */
+		$document = $content->getDocument();
+		$dms = $document->getDMS();
+		$folder = $document->getFolder();
+
+		if($this->settings->_enableNotificationAppRev) {
+			$subject = "approval_request_email_subject";
+			$message = "approval_request_email_body";
+			$params = array();
+			$params['name'] = $document->getName();
+			$params['folder_path'] = $folder->getFolderPathPlain();
+			$params['version'] = $content->getVersion();
+			$params['comment'] = $document->getComment();
+			$params['username'] = $user->getFullName();
+			$params['url'] = getBaseUrl().$this->settings->_httpRoot."out/out.ViewDocument.php?documentid=".$document->getID()."&currenttab=revapp";
+			$params['sitename'] = $this->settings->_siteName;
+			$params['http_root'] = $this->settings->_httpRoot;
+
+			$approvalStatus = $content->getApprovalStatus();
+			foreach($approvalStatus as $dastat) {
+				if ($dastat["status"] == 0) {
+					if ($dastat["type"] == 0) {
+
+						$approver = $dms->getUser($dastat["required"]);
+						$this->toIndividual($document->getOwner(), $approver, $subject, $message, $params, SeedDMS_NotificationService::RECV_APPROVER);
+					} elseif ($dastat["type"] == 1) {
+					
+						$group = $dms->getGroup($dastat["required"]);
+						$this->toGroup($document->getOwner(), $group, $subject, $message, $params, SeedDMS_NotificationService::RECV_APPROVER);
+					}
+				}
+			}
+		}
+	} /* }}} */
+
 	/**
 	 * This notification is sent when a new document is created.
 	 */