This company is a scam. Those letters are essentially illegal. The docket number is a forgery and more than likely doesn't correspond to a docket number used in your state, or the United States. Robert Weinberg is not a registered attorney in Illinois. He most likely doesn't exist. P.N. Financial used to sign their letters John Sullivan, who also isn't a registered Attorney in Illinois. The actual owner of this company is Nelson Macwan, convicted drug dealer and Medicaid con-man from New York.
And I can almost guarantee you P.N. Financial has not obtained a judgment against you.
1.) Do not give them a dime. Do not give them your bank account info. Do not give them any personal info.
2.) Send them a debt validation letter (you can find samples all over the internet) and a cease and desist letter.
3.) Complain in writing to the Attorney General of Illinois, the Attorney general of your own state, and the Illinois Department of Professional Regulation.
In my case, they only responded to the Attorney General complaints and, in essence, dropped their attempt to collect a debt I didn't owe. I'd expect likewise in your case.