Why would you need a credit check? Broker will only give you margin on the account balance and believe me they won't let it go to zero.
Get a copy of the margin agreement online and read it. If it requires updated financials then your answer may be there. Many firms require a credit check for futures and uncovered index options, but the big target is futures. Avoid any misrepresentation, because that can be the first thing you'll end up seeing in an arbitration.
Thank you. I tried to search for answers before I started a new thread, but nothing came up. What happened to me was brutal, so now I have a massive tax loss carryforward that I need to use up by earning capital gains. So I need to invest again. Even though I sell naked puts and calls, I am one of the most risk-averse investors you will ever see. Unfortunately, I got over-leveraged and had 30 years of gains wiped out in 15 minutes.