Hi Kumar,
As you must already seen from note 1404650, this node is filled from the note to payee defined in OBPM2 which I see you have done already.
Now coming to your issue I understand that you do not want the node </ustrd> to come in output of xml file of there is no value for text field i.e.there is no text with prefix * (asterix).
In such cases please goto DMEE, select your tree for example SEPA_CT and hence select the node USTRD. For this node check the atttibutes section, here ensure status is '2'.
Also ensure note 1584497 is implemented in your system.
This should solve the issue reported.
Kind Regards
Soumya Rao