Bookmakers in italy tax report

[betcasino]

Hi everyone
I have heard that bookmakers who have license in italy like for example bet365.it
report profits of the client to the tax office. But this doesent make a lot of sense. Has anyone any information about this?

 

[wynnbet]

Why should they do if winnings are already taxed?
Where did you take that info? In my opinion this is a big fake news.