diff --git a/app/Listeners/CheckoutableListener.php b/app/Listeners/CheckoutableListener.php
index 6037ee1ec4..145abb1687 100644
--- a/app/Listeners/CheckoutableListener.php
+++ b/app/Listeners/CheckoutableListener.php
@@ -307,7 +307,7 @@ class CheckoutableListener
             return $event->checkedOutTo->manager?->email ?? '';
         }
         else{
-            return $event->checkedOutTo->email;
+            return $event->checkedOutTo?->email ?? '';
         }
     }