T & E - BAdi (TRIP_WEB_CHECK) - RECEIPTS internal table is not populated ?

I am using the method USER_CHECK _ RECEIPTS of the BAdi defn. (TRIP_WEB_CHECK) for validating the portal T&E .

The BAdi gets triggered when I am trying to delete a line item in the credit card payment for a particular trip, BUT the changing parameter RECEIPTS doesn't populate any values in the BAdi.

From this I couldn't get the line item values!

So kindly suggest how should I go further?

Also,

Is the above mentioned BAdi can be used only for dynpro (portal) OR it can also be used for PA05 tcode?

Thanks!

Developer