Jeremy,
I might have missed it but I did not see which state you are in. Each state has different ways to collect and get a judgment on someone. For instance, in Texas you can't garnish wages, or anything on someone that owes you money. It is a real pain. I live in Michigan were we can garnish state income tax refunds, bank accounts and wages. But on the NSF check - call your local police department or court - ask what the recourse is in your area. For instance, in my county - they have a new program to assist people in this situation - with a bounced check. It is a felony over a certain amount and they will assist you with collecting. You might not need to get a judgement, but if you do - find out those procedures - and use a company to locate this person. You can find a skip tracer (probably one advertising on this site) for about $10. they can find about anyone - anywhere. I hope this helps.