Well you have one problem that I can see and that's you don't know where he lives. 99% of the time when you file a claim they need an address, so he can be served with the papers, and if you don't have one they don't do the investigation work for you to find him. Did he ever say where he worked and do you remember? becuase you could have him served right there at work which makes him look bad in front of his employer. To be sneaky, if he moved and you don't know where you could try to talk to the post office and see if you can get the forwarded address for him. Just tell the post office that your name is his and say that you aren't getting you forwarded mail you want to see if their address on file is correct. This has work with me when I needed to track someone down. Besides that flaw of not knowing where he is you can sue him.