diff --git a/src/ATBAPP/DeviceControllerInterface.h b/src/ATBAPP/DeviceControllerInterface.h
index 1385ba3..24925e6 100644
--- a/src/ATBAPP/DeviceControllerInterface.h
+++ b/src/ATBAPP/DeviceControllerInterface.h
@@ -62,7 +62,7 @@ public:
     virtual void requestPrintTicket(const QHash<QString, QVariant> & printingData) = 0;
     virtual void requestPrintTicket(nsDeviceControllerInterface::TICKET_VARIANT ticketVariant, const QHash<QString, QVariant> & printingData) = 0;
     virtual void requestPrintReceipt(const QHash<QString, QVariant> & printingData) = 0;
-
+    virtual void requestPrintReceipt(const QString & printingString) = 0;
 
     // mandantory ATBAPP plugin methods:
     virtual nsDeviceControllerInterface::PLUGIN_STATE getState() = 0;
@@ -91,6 +91,9 @@ signals:
     void printTicketFinished(nsDeviceControllerInterface::RESULT_STATE resultState,
                                      const QString & errorCode,
                                      const QString & errorDescription);
+    void printReceiptFinished(nsDeviceControllerInterface::RESULT_STATE resultState,
+                                     const QString & errorCode,
+                                     const QString & errorDescription);
 
     /**
      * emitted on e.g. a coin input