Basic steps for registration of participants

modules/event-participants/Controllers/class-ajaxrouter.php

@@ -38,6 +38,10 @@ class AjaxRouterController {
                 new PrintParticipantListPhotoPdfController();
                 break;
 
+            case 'print_invoice_data':
+                new PrintParticipantListInvoicePdfController();
+                die();
+
 			default:
 				echo 'No "method" specified.';
 		}