//Regional policy commissioner Pawel Samecki defended the commission's claw back policy. He stressed that in 2009, the EU executive recovered €629 million in incorrectly claimed payments. "We estimate that we will recover another half a billion euro by the end of 2009. This is on top of the €1.5 billion in corrections we made in 2008," he said in a statement.
As payments are stretched out over several years and recovery procedures can also take quite some time, the only reliable figure, in Mr Kallas' view, is that of €18 million, which in 2008 was declared as being lost forever from the EU budget.//
http://www.businesswe...gb20091111_227985.htm
Just because the accounts cannot be signed off does not necessarily mean it is because money has been fraudulently taken. There are 27 states with different cultures and practices. It is incredibly difficult to pull all of them into a reliable set of figures.