Euro banknotes entered circulation on 23 September 2014. The full design of the Europa series 20 euro banknote was revealed on 24 February 2015, On 4 May 2016, the European Central Bank announced that the Europa series 500 euro banknote would not be released, due to fears of "facilitating the criminal activity". The old series will gradually be withdrawn. The ECB will announce "well in advance" when the old notes will lose their legal tender status. However, they will not lose their value and it will be possible to exchange them for new notes at Eurosystem central banks indefinitely. "A good design
Greek withdrawal from the eurozone first demonstration took place in Athens, Syntagma Square in June 2012 in between two major elections that brought to the country political instability and financial insecurity. A Grexit, assuming that it coincided with adoption of a new currency, would require preparation, for example with capacity for banknote stamping or printing a stock of new banknotes. However, information leaking out on such preparations might lead to negative dynamic effects, like bank runs. Conversely, leaving the Eurozone, but retaining the Euro as de facto currency, would avoid the practical issues and relieve the country of the burden of its Eurozone responsibilities. In