our financial house of cards and how to start, page-18

It's irrelevant whether KPMG has audited the US Mint - that merely involves a review of procedures and practices and whether the gold is physically present. A review of the US Treasury Department is what is needed to find out whether there are any encumbrances or restrictions on the ownership of the gold stored there.

A report by Hidetoshi Takeda from the IMF Statistics department two years ago lends credibility to the assertion that the US no longer has full control over the gold in their custody due to the way that golds swaps and loans are accounted for. He says that, "IMF rules have encouraged overstating reserve assets because both the funds received from the gold swap and the gold are included in reserve assets"

http://www.imf.org/external/np/sta/bop/pdf/resout11.pdf