If they have you on record as an owner they will set up a database to determine compliance with turning them in. If not you will be held "in contempt" or some such charges. If you say you no longer have it they will say that is no excuse due to being irresponsible. I can also see penalties such as loss of your job, being labeled a felon, or having any tax refunds, etc. taken if you are an "offender". This is what the founders sought to prevent very explicitly.