It depends on where you live. Some places have the privacy built-in. In Canada anybody can get the name associated with a plate, but it costs ~$30 CAD and your

It depends on where you live. Some places have the privacy built-in. In Canada anybody can get the name associated with a plate, but it costs ~$30 CAD and your name and drivers license number is verified and stored to do so. If you want the address you must be a licensed private investigator (~$350 CAD course and ~$80 CAD test) or police, again the access is logged. In the UK you need to write to the ministry for even a name, not sure of the level of difficulty or likelihood of the request being granted. In the USA, it depends on the state. Many you can get freely and anonymously from a 3rd party database.