diff --git a/application/controllers/Qso.php b/application/controllers/Qso.php
index 65ae5ca48..5957b1c1d 100644
--- a/application/controllers/Qso.php
+++ b/application/controllers/Qso.php
@@ -181,7 +181,11 @@ class QSO extends CI_Controller {
 			// Add QSO
 			// $this->logbook_model->add();
 			//change to create_qso function as add and create_qso duplicate functionality
-			$adif = $this->saveqso();
+			$saveresult = json_decode($this->saveqso(), true);
+
+			// Clear POST data to prevent re-submission on page reload
+			$_POST = [];
+			$this->form_validation->reset_validation();
 
 			$returner=[];
 			$actstation=$this->stations->find_active() ?? '';
@@ -192,17 +196,18 @@ class QSO extends CI_Controller {
 			$returner['message']='success';
 
 			// Include ADIF for WebSocket transmission
-			if ($adif) {
-				$returner['adif'] = $adif;
+			if (isset($saveresult['adif'])) {
+				$returner['adif'] = $saveresult['adif'];
 			}
 
-			// Get last 5 qsos
+			header('Content-Type: application/json; charset=utf-8');
 			echo json_encode($returner);
 		}
 	}
 
 	/*
 	 * This is used for contest-logging and the ajax-call
+	 * Returns JSON
 	 */
 	public function saveqso() {
 		$this->load->model('logbook_model');
@@ -270,7 +275,9 @@ class QSO extends CI_Controller {
 			'distance' => $this->input->post('distance', TRUE) ?? TRUE
 		];
 
-		$this->logbook_model->create_qso($qso_data);
+		$result = $this->logbook_model->create_qso($qso_data);
+
+		return json_encode($result, JSON_PRETTY_PRINT);
 	}
 
 	function edit() {
diff --git a/application/models/Logbook_model.php b/application/models/Logbook_model.php
index 09b9fb131..8b4b8ee87 100644
--- a/application/models/Logbook_model.php
+++ b/application/models/Logbook_model.php
@@ -163,12 +163,12 @@ class Logbook_model extends CI_Model {
 		$ant_path_input = $qso_data['ant_path'] ?? '';
 		$ant_path = in_array($ant_path_input, ['G', 'O', 'S', 'L']) ? trim($ant_path_input) : NULL;
 
-		$darc_dok = trim($qso_data['darc_dok']);
-		$qso_locator = strtoupper(trim($qso_data['locator']) ?: NULL);
-		$qso_qth = trim($qso_data['qth']);
-		$qso_name = trim($qso_data['name']);
+		$darc_dok = trim($qso_data['darc_dok'] ?? '');
+		$qso_locator = strtoupper(trim($qso_data['locator'] ?? '') ?: NULL);
+		$qso_qth = trim($qso_data['qth'] ?? '');
+		$qso_name = trim($qso_data['name'] ?? '');
 		$qso_age = NULL;
-		$qso_state = trim($qso_data['input_state']) ?: NULL;
+		$qso_state = trim($qso_data['input_state'] ?? '') ?: NULL;
 		$qso_rx_power = NULL;
 
 		if ($qso_data['copyexchangeto']) {
@@ -233,8 +233,8 @@ class Logbook_model extends CI_Model {
 			'COL_RST_SENT' => $qso_data['rst_sent'],
 			'COL_NAME' => $qso_name,
 			'COL_COMMENT' => $qso_data['comment'],
-			'COL_SAT_NAME' => strtoupper($qso_data['sat_name']) ?: NULL,
-			'COL_SAT_MODE' => strtoupper($qso_data['sat_mode']) ?: NULL,
+			'COL_SAT_NAME' => strtoupper($qso_data['sat_name'] ?? '') ?: NULL,
+			'COL_SAT_MODE' => strtoupper($qso_data['sat_mode'] ?? '') ?: NULL,
 			'COL_COUNTRY' => $country,
 			'COL_CONT' => $continent,
 			'COL_QSLSDATE' => $qslsdate,
@@ -248,7 +248,7 @@ class Logbook_model extends CI_Model {
 			'COL_OPERATOR' => strtoupper(trim($qso_data['operator_callsign'] ?? $this->session->userdata('operator_callsign'))),
 			'COL_QTH' => $qso_qth,
 			'COL_PROP_MODE' => $prop_mode,
-			'COL_IOTA' => trim($qso_data['iota_ref']) ?: NULL,
+			'COL_IOTA' => trim($qso_data['iota_ref'] ?? '') ?: NULL,
 			'COL_FREQ_RX' => $this->parse_frequency($qso_data['freq_display_rx']),
 			'COL_ANT_AZ' => $ant_az,
 			'COL_ANT_EL' => $ant_el,
@@ -259,8 +259,8 @@ class Logbook_model extends CI_Model {
 			'COL_TX_PWR' => $tx_power,
 			'COL_STX' => $stx,
 			'COL_SRX' => $srx,
-			'COL_STX_STRING' => strtoupper(trim($stx_string)) ?: NULL,
-			'COL_SRX_STRING' => strtoupper(trim($srx_string)) ?: NULL,
+			'COL_STX_STRING' => strtoupper(trim($stx_string ?? '')) ?: NULL,
+			'COL_SRX_STRING' => strtoupper(trim($srx_string ?? '')) ?: NULL,
 			'COL_CONTEST_ID' => $contestid,
 			'COL_NR_BURSTS' => NULL,
 			'COL_NR_PINGS' => NULL,
@@ -275,13 +275,13 @@ class Logbook_model extends CI_Model {
 			'COL_ITUZ' => $qso_data['ituz'] ?: NULL,
 			'COL_STATE' => $qso_state,
 			'COL_CNTY' => $clean_county_input,
-			'COL_SOTA_REF' => strtoupper(trim($qso_data['sota_ref'])) ?: NULL,
-			'COL_WWFF_REF' => strtoupper(trim($qso_data['wwff_ref'])) ?: NULL,
-			'COL_POTA_REF' => strtoupper(trim($qso_data['pota_ref'])) ?: NULL,
-			'COL_SIG' => strtoupper(trim($qso_data['sig'])) ?: NULL,
-			'COL_SIG_INFO' => strtoupper(trim($qso_data['sig_info'])) ?: NULL,
-			'COL_DARC_DOK' => strtoupper(trim($darc_dok)) ?: NULL,
-			'COL_NOTES' => strtoupper(trim($qso_data['notes'])) ?: NULL,
+			'COL_SOTA_REF' => strtoupper(trim($qso_data['sota_ref'] ?? '')) ?: NULL,
+			'COL_WWFF_REF' => strtoupper(trim($qso_data['wwff_ref'] ?? '')) ?: NULL,
+			'COL_POTA_REF' => strtoupper(trim($qso_data['pota_ref'] ?? '')) ?: NULL,
+			'COL_SIG' => strtoupper(trim($qso_data['sig'] ?? '')) ?: NULL,
+			'COL_SIG_INFO' => strtoupper(trim($qso_data['sig_info'] ?? '')) ?: NULL,
+			'COL_DARC_DOK' => strtoupper(trim($darc_dok ?? '')) ?: NULL,
+			'COL_NOTES' => strtoupper(trim($qso_data['notes'] ?? '')) ?: NULL,
 			'COL_EMAIL' => $email ?: NULL,
 			'COL_REGION' => $region ?: NULL,
 		);
@@ -386,17 +386,21 @@ class Logbook_model extends CI_Model {
 		}
 		unset($data);
 
-		// Return ADIF for WebSocket transmission
-		if ($qso_id) {
-			$qso = $this->get_qso($qso_id, true)->result();
-			if ($qso && !empty($qso)) {
-				if (!$this->load->is_loaded('AdifHelper')) {
-					$this->load->library('AdifHelper');
-				}
-				return $this->adifhelper->getAdifLine($qso[0]);
-			}
+		// Return qso_id and adif data
+		if (!$qso_id) {
+			return false;
 		}
-		return NULL;
+
+		$qso = $this->get_qso($qso_id, true)->result();
+		if (empty($qso)) {
+			return false;
+		}
+
+		$this->load->is_loaded('AdifHelper') ?: $this->load->library('AdifHelper');
+		return [
+			'qso_id' => $qso_id,
+			'adif' => $this->adifhelper->getAdifLine($qso[0])
+		];
 	}
 
 	public function check_last_lotw($call) {	// Fetch difference in days when $call has last updated LotW
diff --git a/assets/js/sections/qso.js b/assets/js/sections/qso.js
index 48e0f83d8..71bd472e3 100644
--- a/assets/js/sections/qso.js
+++ b/assets/js/sections/qso.js
@@ -347,8 +347,8 @@ $("#qso_input").off('submit').on('submit', function (e) {
 			type: 'post',
 			timeout: 10000,
 			data: $(this).serialize(),
-			success: function (resdata) {
-				result = JSON.parse(resdata);
+			dataType: 'json',
+			success: function (result) {
 				if (result.message == 'success') {
 					activeStationId = result.activeStationId;
 					activeStationOP = result.activeStationOP;