Ok, I bought a tandem axle car trailer off a guy in SC. He didn't have a title or a license for it. I called the DOT this morning and they told me I need to get a duplicate copy of the title in order to register it. I have no idea how I would do this, its not like a trailer has a serial # or vin # on it to look up. Would I be ok with not registering it? Any other suggestions?