diff --git a/application/controllers/Clublog.php b/application/controllers/Clublog.php
index 8472b5da..74801237 100644
--- a/application/controllers/Clublog.php
+++ b/application/controllers/Clublog.php
@@ -107,6 +107,14 @@ class Clublog extends CI_Controller {
 							} else {
 								echo "Error ".$response;
 								log_message('error', 'Clublog upload for '.$station_row->station_callsign.' failed reason '.$response);
+
+								// If Clublog responds with a 403
+								if ($info['http_code'] == 403) {
+									$this->load->model('clublog_model');
+									echo "Clublog API access denied for ".$station_row->station_callsign."<br>";
+									log_message('error', 'Clublog API access denied for '.$station_row->station_callsign);
+									$this->clublog_model->reset_clublog_user_fields($station_row->user_id);
+								}
 							}
 
 							// Delete the ADIF file used for clublog
diff --git a/application/models/Clublog_model.php b/application/models/Clublog_model.php
index 009b5412..8aa157fe 100644
--- a/application/models/Clublog_model.php
+++ b/application/models/Clublog_model.php
@@ -17,6 +17,17 @@ class Clublog_model extends CI_Model {
 		return $row = $query->row_array();
 	}
 
+	// function to reset clublog fields for the user in the auth table
+	function reset_clublog_user_fields($user_id) {
+		$data = array(
+			'user_clublog_name' => null,
+			'user_clublog_password' => null,
+		);
+
+		$this->db->where('user_id', $user_id);
+		$this->db->update($this->config->item('auth_table'), $data);
+	}
+
 	function mark_qsos_sent($station_id) {
 		$data = array(
 	        'COL_CLUBLOG_QSO_UPLOAD_DATE' => date('Y-m-d'),