diff --git a/inc/inc.ClassNotificationService.php b/inc/inc.ClassNotificationService.php
index 2fd9b22d0..4da8218da 100644
--- a/inc/inc.ClassNotificationService.php
+++ b/inc/inc.ClassNotificationService.php
@@ -1471,6 +1471,35 @@ class SeedDMS_NotificationService {
 			$this->toGroup($user, $recipient, $subject, $message, $params, SeedDMS_NotificationService::RECV_RECIPIENT);
 	} /* }}} */
 
+	/**
+	 * Send a request receipt notification to all recipients of the document content
+	 *
+	 * This method can be called when the status of a document content changes
+	 * to 'released'. The recipients haven't been informed when the
+	 * document content was created but not immediatly released.
+	 */
+	public function sendToAllReceiptMail($content, $user) { /* {{{ */
+		$dms = $content->getDMS();
+
+		$receiptStatus = $content->getReceiptStatus();
+		if (!empty($receiptStatus)) {
+			foreach ($receiptStatus as $r) {
+				if($r['status'] == 0) {
+					switch ($r["type"]) {
+						case 0: // Recipient is an individual.
+							if($recipient = $dms->getUser($r["required"]))
+								$this->sendAddReceiptMail($content, $user, $recipient);
+							break;
+						case 1: // Recipient is a group.
+							if($recipient = $dms->getGroup($r["required"]))
+								$this->sendAddReceiptMail($content, $user, $recipient);
+							break;
+					}
+				}
+			}
+		}
+	} /* }}} */
+
 	public function sendChangedDocumentOwnerMail($document, $user, $oldowner) { /* {{{ */
 		if($oldowner->getID() != $document->getOwner()->getID()) {
 			$notifyList = $document->getNotifyList();