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.