Cert. letter will win your case in court. NEVER walk into court w/ he said she said shit. You will piss the judge off and waist his time. If you go in there fully prepared he will close the case quickly and in your favor. It sucks you have to take these measures…but its what you have to do. besides if he moved back in w/ mommy and daddy…they will more than likely get the letter and possibly make him handle his debt. You can hope anyways, good luck!