When you look at the CFO website, it mentions a police clearance but it does not state it is for the petitioner. I think this causes some confusion for them. What I did was just did an online background check so I can send her with that. They obviously checked our backgrounds front to back when we applied and without us having a clean record, there would be no CFO appointment. I think this is where a lot of the confusion comes from. I have seen on this site on a few other threads that one was needed lol. You would think if it is necessary it would say SOMEWHERE that its needed, USCIS, Dept of State website etc.