NAKED put writing means you write a put and do not have the cash to buy the stock if the put is exercised.
I write puts in my IB IRA all the time. You have to have sufficient cash to cover the exercise and they lock the cash up as long as your position is open.
So if a broker lets someone write a put, and that guy doesn't have the cash when it is exercised, is the broker responsible? Or criminally liable?