Well then thats the trick. A legal research team that develops the form for as many sites as you could find, and then a mechanism to send that form filled with each users data to those sites.
My only fear is that you're now sending this all to them, but in 2019, we can safely say your name+DOB+address isn't a secret. Or national identity number if that's a thing in your jurisdiction.
It's the metadata around it we want wiped out.