diff --git a/src/app/action/controllers/AcknowledgementReceiptTrait.php b/src/app/action/controllers/AcknowledgementReceiptTrait.php
index 5184d822615539909644736f4689551a0fc4131e..34432924ebe000bf92948fefbc944aefe5a2725c 100644
--- a/src/app/action/controllers/AcknowledgementReceiptTrait.php
+++ b/src/app/action/controllers/AcknowledgementReceiptTrait.php
@@ -150,7 +150,9 @@ trait AcknowledgementReceiptTrait
             if (!empty($contact['email'])) {
                 $emailsToSend[] = ['id' => $id, 'email' => $contact['email'], 'encodedHtml' => $mergedDocument['encodedDocument']];
             }
-            $ids[] = $id;
+            if ($format == 'pdf') {
+                $ids[] = $id;
+            }
         }
         DatabaseModel::commitTransaction();