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 The old series will gradually be withdrawn.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
100 krooni used for withdrawals or cashing checks. It can be exchanged indefinitely at the currency museum of Eesti Pank for €6.39. Source: 100 krooni The 100 krooni banknote (100 EEK) is a denomination of the Estonian kroon, the former currency of Estonia. Lydia Koidula (1843–1886), who was an Estonian poet and playwright, is featured on the front side of the banknote, which is why the 100 krooni banknote is often called a ""Koidula"". A view of the north Estonian limestone shore is featured on the reverse side of the banknote. Before the replacement of the kroon by the euro, the 100