500 euro note 26 April 2019. “Authorities increasingly suspect that they (€500 notes) are being used for illegal purposes, an argument that we can no longer ignore,” according to a high-ranking bank official, Benoît Cœuré. The euro was founded on 1 January 1999, when it became the currency of over 300 million people in Europe. For the first three years of its existence it was an invisible currency, only used in accountancy. Euro cash was not introduced until 1 January 2002, when it replaced the national banknotes and coins of the countries in eurozone 12, such as the Luxembourgish franc. Slovenia joined the
Currency substitution financial assets denominated in a foreign currency. It can also occur as a gradual conversion to full currency substitution, for example, Argentina and Peru were both in the process of converting to the U.S. dollar during the 1990s. "Dollarization", when referring to currency substitution, does not necessarily involve use of the United States dollar. The currencies that have been used as substitutes have been the US dollar, the euro, and the Australian dollar. After the gold standard was abandoned at the outbreak of World War I and the Bretton Woods Conference following World War II, some countries sought exchange rate