Audits were a total disaster in the case of Peregrine Fin. In one case, the fraud was exposed when a secretary faxed the REAL values for account holdings to the auditors.
Then Wasendorf bluffed them out, by telling them the wrong financial statements were submitted by mistake, but he'd be happy to forward the REAL balance sheets. LOL
And it worked! Even when he should have been caught red-handed, they got duped. Kinda the same thing like when x-futures trader Markopolos sent a bundle of docs to the SEC outlaying Madoffs entire ponzi scheme, they totally ignored it.
And most interesting, Ed Thorp did research before Markopolos and wrote an article about Madoff's system being a ponzi too. But no one was listening...