Use the QR-code in the "DynamicDeliverableDonePopup" that will be triggered from the TriggerAction defined in the Article.
<TFT:PopupPanel Name="DynamicDeliverableDonePopup" MxStyle="{PopupStyle}" Timeout="15" TimeoutEvent="OnSilentReject" >
<Controls>
<TFT:MatrixBarcode MxStyle="{MatrixBarcodeStyle}" Name="ExternalPayUnitMatrixBarcode_Ext2"/>
</Controls>
</TFT:PopupPanel>