 You may have heard that the ECB has released a new 50 euro banknote, but there are probably five things you still don't know about it. Did you know that the 50 euro banknote is the most widely used banknote in the euro system? There are 8 billion 50 euro notes in circulation, that's almost half of all cash in circulation. This leads us to fact number two. Our experts work hard to keep it safe and secure. We're here at the ECB's Banknote Counterfeit Research Lab, where an ECB counterfeit expert will tell you more. The euro 50 is the most counterfeited denomination. We have therefore enhanced the security features. One of the new features is the emerald number. It's the numeral that changes colour from green to blue as you tilt the note and at the same time you will see an effect of the light moving up and down. In the portrait window you can see the face of Europa, and on the reverse side you will see more 50s in rainbow colours. It costs between 6 and 10 cents to produce a euro banknote. This is the total cost of the ink, the paper and the printing. The cost differs based on the various sizes and security features. No joke, there was once a farmer in the Netherlands who scoured a euro banknote. He took back the pieces and got a replacement for it. If you lost your note, they can't help you there. So why don't we just put the new 50 euro banknote in your hand today, the day we're unveiling it? Well, remember each ATM in Europe is programmed to recognise euro banknotes. There are 19 countries using the euro with almost 170.000 bank branches. Therefore a lot of ATMs will have to be updated. The new 50 will be released in April 2017. See what it looks like and visit our website to find out more details about the new Europa series.