diff --git a/booking.balance.inc b/booking.balance.inc
index 86fc820..2063667 100644
--- a/booking.balance.inc
+++ b/booking.balance.inc
@@ -14,7 +14,7 @@ function booking_balance_page() {
 	//verify that arg(1) is a uuid
 	if (! preg_match('/^[0-9A-Fa-f\-]+$/', arg(1))) {
 		//parameter from url is not what we were expecting
-		drupal_set_message("Error: Invalid session ID supplied to the balance payment page. Please use the contact us form to let us know.", 'error', FALSE);
+		drupal_set_message("Error: Invalid token supplied to the balance payment page. Please use the contact us form to let us know.", 'error', FALSE);
 		drupal_goto('<front>');
 		return "";
 	}	
@@ -49,7 +49,8 @@ function booking_balance_page() {
 		//maximum length for invoice id in paypal is 127 characters so truncate if necessary
 		$invoiceid = substr($invoiceid, 0, 126);		
 	} else {
-		drupal_set_message("Unable to find matching session ID " . arg(1), 'error', FALSE);
+		drupal_set_message("Error: Invalid token supplied to the balance payment page. Please use the contact us form to let us know.", 'error', FALSE);
+		drupal_goto('<front>');
 		return "";
 	}