Naked calls have an infinite loss, since it can go up as high as they can.
Put writing, is a bit safer, since there is a finite amount of risk involved. There is two types, naked, and cash secured.
Depending on the firm, but generally all follow the same guidelines. I do not recall them as I dont do them for client, but I do have in the office the criterion required.
Typically, if you have the cash for the underlying stock, it can be "collateralized" and you can write the put. As it gets more in the clear, it can be released. Check with the place you are trading, but it is not NAKED put writing... it is CASH SECURED PUT writing.
