oh, that makes sense. technically, but still have a problem legally. I mean, I could create a false account - after all, no one is asking any legally binding ID over the internet.
The only place I know personally is the registration with our fiscal authority where to get an account you have to go and register in person in a financial police office.
Unless DCO is meant to be used with PEC/ De-Mail etc, but I guess that very very few geeks would comply