Hi Ludovico,
This BAdI is only available for internal use in SAP. You can see this in SE18:
Usage limited to SAP
This indicator defines that the BADI definition is only designated for
internal SAP usage. Creation of BADI implementations by the customer is
therefore not possible.
Please, close this thread and make a new search based on what you need. If you don't find any possible solution open a new thread.
Kind Regards,
Mariano