I have just read this :

FRANKFURT (Reuters) - The number of fake euro banknotes is on the rise, the European Central Bank (ECB) said on Thursday, with the 50 euro note the preferred choice of counterfeiters.
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The ECB said the number of fake euro notes seized by authorities had jumped more than 15 percent in the first six months of the year.

A total of 312,000 dodgy notes were taken out of circulation in the first half of 2008, the highest since 2003 and up from 265,000 in the first half of 2007.

The ECB said 36 percent of all seizures were 50 euro notes, 33 percent were 20's and 21.5 percent of recoveries were 100 euro notes.

The Frankfurt-based central bank estimates that there are around 11.5 billion legitimate euro notes if circulation following its introduction in 2002.

It revealed on Wednesday that as much of 20 percent of all euro notes are in countries where it is not even legal tender.

"When the figures...are compared with the number of genuine euro banknotes in circulation, the quantity of counterfeits is very small indeed," the ECB said

I wouldnt know a real one from a fake one... how can you tell?

It easy to tell

Real: http://www.lajolieronde.co.uk/img/euro%20notes.jpg

and

Fake: http://www.euronotes.be/images/600back.JPG

Oh Graham
Take it seriously ! - I have and my printing press is now switched off.

But.........  I always remember , many years ago, the old lady at Asda in England who handed over a £20 note to the cashier only to be told it was a forgery.
Asda then had to consficate it! - Bang went a part of her pension.
( She told them it was part of the cash the Post Office gave her that morning )

Cheers
Negg