Go the judgment route...once it is on the credit report it will be very hard to obtain credit from someone else....if this person tries to buy a home it will HAVE to be paid or they are SOL. I know, I am a Mortgage person and we will not let it slide...even if it was medical. This will also lower the credit score so hit him where it hurts and make this a glaring problem for life, it will NEVER come off until it is paid and will allow you to garnish wages. These are all very embarrassing things and will haunt them forever or until it is paid. You could also NAME NAMES.

and we can shame this person into paying.

By the way I am in Boston for the week if you are up for anything (4/14 - 4/18)