diff --git a/core/country.class.php b/core/country.class.php
index c8ac357..a422252 100644
--- a/core/country.class.php
+++ b/core/country.class.php
@@ -261,6 +261,14 @@ class Country extends Main {
 	public static function getShippingAreaById($countryId, $customer_group_id = false) {
 		$db = Registry::get('base')->db;
 
+		// 22.09.2026: leeres Land (Gast-Kasse per Enter abgeschickt, Land nicht gewaehlt) lief in
+		// "WHERE id = " und damit in einen SQL-Fatal -> HTTP 500 mit leerer Seite in der Kasse.
+		$countryId = (int) $countryId;
+		$customer_group_id = (int) $customer_group_id;
+		if ($countryId <= 0) {
+			return false;
+		}
+
 		$sql = "SELECT shipping_area_id
 				FROM countries
 				WHERE id = $countryId";
diff --git a/modules/website_cashdesk.php b/modules/website_cashdesk.php
index 7e95802..a6d3b7b 100644
--- a/modules/website_cashdesk.php
+++ b/modules/website_cashdesk.php
@@ -694,6 +694,10 @@ class website_cashdesk {
 
 		if (isset($_POST['shipping']) && $_POST['shipping']['address'] == -1) {
 			$this->shipping_address = $_POST['billing'];
+			if (empty($this->shipping_address['country'])) {
+				// 22.09.2026: Land nicht gewaehlt -> Standardland fuer die Versandgebiet-Suche, sonst SQL-Fatal
+				$this->shipping_address['country'] = $this->customer_data->default_address_country_id;
+			}
 			$_POST['shipping'] = $_POST['billing'];
 		} else if (isset($_POST['shipping'])) {
 			if (!$this->shipping_address['country']) {