We are leaving Thailand, but our flight is 12 days past our exemption visa. We are thinking about doing an extension. We haven't done one before, and we are worried because he just got a new passport, and the visa was in the old passport. Would an extension be put into an old passport or the new one? Would that be a problem? Would it be better to cross the border and just re-enter with the new passport? We are worried we will be denied reentry because we've had two exemption visas already. Any advice?