All Fed's Financials audited by a private sector firm. http://www.federalreserve.gov/monetarypolicy/bst_fedfinancials.htm The only non-disclosure by the Fed that is happening is the names of the institutions that are getting liquidity through TAF, discount window, etc. That is a standard procedure that is used globally by most central banks, instead of blaming the fed look at the mirror on why they dont disclose, you would freak out with all your uninsured money in a bank that is getting tons of help from the fed. Blame yourself
Citi can't legally make spurious dollars appear on their Balance Sheet. They need to ask the fed to do it for them (...and I agree that the two are pretty close to the same thing lately). The fed does get audited by one of the big 4, and the findings pubished; on and of balance sheetitems are included. I think by definition the fed can't be undercapitalized. It'd like saying "you have too little of the stuff that you can create from nothing, on a whim, in whatever quantity you desire."