diff --git a/lang/en/turnitintooltwo.php b/lang/en/turnitintooltwo.php
index 17b2d41a..38fab471 100755
--- a/lang/en/turnitintooltwo.php
+++ b/lang/en/turnitintooltwo.php
@@ -685,3 +685,4 @@
 $string['max_marks_warning'] = 'Please be aware that changing the Marks Available after grading may affect the gradebook';
 $string['download_button_warning'] = 'A student must be selected for this feature to be available.';
 $string['noguests'] = 'Sorry, no guest users are allowed to access this plugin. Please login.';
+$string['usernotfound'] = 'Unable to process user (ID: {$a}). This error might be due to inconsistent course data, corrupted user records, or incorrect user mapping between Moodle and Turnitin.  Please contact your Moodle administrator for further investigation.';
\ No newline at end of file
diff --git a/turnitintooltwo_user.class.php b/turnitintooltwo_user.class.php
index 433b6ad8..840abe6f 100644
--- a/turnitintooltwo_user.class.php
+++ b/turnitintooltwo_user.class.php
@@ -84,7 +84,16 @@ public static function get_moodle_user_id($tiiuserid) {
     public function get_moodle_user($userid) {
         global $DB;
 
-        $user = $DB->get_record('user', array('id' => $userid));
+        $dbUser = $DB->get_record('user', array('id' => $userid));
+
+        $user = new TiiUser();
+
+        if ($dbUser) {
+            $user = (object) $dbUser;
+        } else {
+            \core\notification::add(get_string('usernotfound', 'turnitintooltwo', $userid), \core\output\notification::NOTIFY_ERROR);
+            return false;
+        }
 
         // Moodle 2.0 replaces email with a hash on deletion, moodle 1.9 deletes the email address check both.
         if (empty($user->email) || strpos($user->email, '@') === false) {