diff --git a/classes/privacy/provider.php b/classes/privacy/provider.php
index a9571ee..48a33d6 100644
--- a/classes/privacy/provider.php
+++ b/classes/privacy/provider.php
@@ -244,12 +244,6 @@ final class provider implements
             $inparams
         );
 
-        // Delete all warnings.
-        $DB->delete_records_select(
-            'attendance_warning_done',
-            "notifyid $insql",
-            $inparams
-        );
         $DB->delete_records_select(
             'attendance_warning_done',
             "userid $insql",
@@ -423,7 +417,8 @@ final class provider implements
      * @param int $attendanceid The id of the attendance instance to remove the relevant warnings from.
      */
     private static function delete_user_from_attendance_warnings_log(int $userid, int $attendanceid) {
-        global $DB;
+        global $DB, $CFG;
+        require_once($CFG->dirroot.'/mod/attendance/lib.php');
 
         // Get all warnings because the user could have their ID listed in the thirdpartyemails column as a comma delimited string.
         $warnings = $DB->get_records(
@@ -435,24 +430,7 @@ final class provider implements
             return;
         }
 
-        // Update the third party emails list for all the relevant warnings.
-        $updatedwarnings = array_map(
-            function(stdClass $warning) use ($userid) : stdClass {
-                $warning->thirdpartyemails = implode(',', array_diff(explode(',', $warning->thirdpartyemails), [$userid]));
-                return $warning;
-            },
-            array_filter(
-                $warnings,
-                function (stdClass $warning) use ($userid) : bool {
-                    return in_array($userid, explode(',', $warning->thirdpartyemails));
-                }
-            )
-        );
-
-        // Sadly need to update each individually, no way to bulk update as all the thirdpartyemails field can be different.
-        foreach ($updatedwarnings as $updatedwarning) {
-            $DB->update_record('attendance_warning', $updatedwarning);
-        }
+        attendance_remove_user_from_thirdpartyemails($warnings, $userid);
 
         // Delete any record of the user being notified.
         list($warningssql, $warningsparams) = $DB->get_in_or_equal(array_keys($warnings), SQL_PARAMS_NAMED);
@@ -531,6 +509,7 @@ final class provider implements
      * @param string $path The path in the export (relative to the current context).
      * @param array $attendances Array of attendances to export the logs for.
      */
+     */
     private static function export_attendance_logs(string $path, array $attendances) {
         $attendancesbycontextid = self::group_by_property($attendances, 'contextid');
 
diff --git a/classes/task/notify.php b/classes/task/notify.php
index b52abe9..e857410 100644
--- a/classes/task/notify.php
+++ b/classes/task/notify.php
@@ -25,6 +25,7 @@
 namespace mod_attendance\task;
 defined('MOODLE_INTERNAL') || die();
 
+require_once($CFG->dirroot . '/mod/attendance/lib.php');
 require_once($CFG->dirroot . '/mod/attendance/locallib.php');
 /**
  * Task class
@@ -103,6 +104,7 @@ class notify extends \core\task\scheduled_task {
                 }
             }
             // Only send one warning to this user from each attendance in this run. - flag any higher percent notifications as sent.
+            $thirdpartyusers = array();
             if (!empty($record->thirdpartyemails)) {
                 $sendto = explode(',', $record->thirdpartyemails);
                 $record->percent = round($record->percent * 100)."%";
@@ -112,6 +114,9 @@ class notify extends \core\task\scheduled_task {
                         // Probably an extra comma in the thirdpartyusers field.
                         continue;
                     }
+                    // Create array of the warnings this user will recieve in case we need to clean up.
+                    $thirdpartyusers[$senduser][] = $record->notifyid;
+
                     // Check user is allowed to receive warningemails.
                     if (has_capability('mod/attendance:warningemails', $context, $senduser)) {
                         if (empty($thirdpartynotifications[$senduser])) {
@@ -138,6 +143,16 @@ class notify extends \core\task\scheduled_task {
         if (!empty($thirdpartynotifications)) {
             foreach ($thirdpartynotifications as $sendid => $notifications) {
                 $user = $DB->get_record('user', array('id' => $sendid));
+                if (empty($user) || !empty($user->deleted)) {
+                    // Clean this user up and remove from the notification list.
+                    $warnings = $DB->get_records_list('attendance_warning', 'id', $thirdpartyusers[$sendid]);
+                    if (!empty($warnings)) {
+                        attendance_remove_user_from_thirdpartyemails($warnings, $sendid);
+                    }
+                    // Don't send and skip to next notification.
+                    continue;
+                }
+
                 $from = \core_user::get_noreply_user();
                 $oldforcelang = force_current_language($user->lang);
 
diff --git a/lib.php b/lib.php
index 0660b0d..752e295 100644
--- a/lib.php
+++ b/lib.php
@@ -498,4 +498,33 @@ function attendance_print_settings_tabs($selected = 'settings') {
     ob_end_clean();
 
     return $tabmenu;
+}
+
+/**
+ * Helper function to remove a user from the thirdpartyemails record of the attendance_warning table.
+ *
+ * @param array $warnings - list of warnings to parse.
+ * @param int $userid - User id of user to remove.
+ */
+function attendance_remove_user_from_thirdpartyemails($warnings, $userid) {
+    global $DB;
+
+    // Update the third party emails list for all the relevant warnings.
+    $updatedwarnings = array_map(
+        function(stdClass $warning) use ($userid) : stdClass {
+            $warning->thirdpartyemails = implode(',', array_diff(explode(',', $warning->thirdpartyemails), [$userid]));
+            return $warning;
+        },
+        array_filter(
+            $warnings,
+            function (stdClass $warning) use ($userid) : bool {
+                return in_array($userid, explode(',', $warning->thirdpartyemails));
+            }
+        )
+    );
+
+    // Sadly need to update each individually, no way to bulk update as all the thirdpartyemails field can be different.
+    foreach ($updatedwarnings as $updatedwarning) {
+        $DB->update_record('attendance_warning', $updatedwarning);
+    }
 }
\ No newline at end of file