Change Invoice Recipient from Billing Document (FI-CA)

Hello everyone,

I need to change the invoice recipient (contract account - business partner) during the invoice creation process.

So, I would like to ask you if there is any event/user exit that I can use in order to do that with the minimum effort.

The standard program involved is RFKKINV01.

NB: since the Billing process is triggered by Banking System (BS)  (thanks to a specific integration with ECC - FI-CA), it is not possible to change details in billing document itself.

Thanks and regards.

Ermanno