Economic history of Spain the European community ever since. The country was a leading proponent of the EU single currency, the euro, long before it had been put into circulation. Together with the other founding euro members, it adopted the new physical currency on January 1, 2002. On that date Spain terminated its historic peseta currency and replaced it with the euro, which has become its national currency shared the rest of the Eurozone. This culminated a fast process of economic modernization even though the strength of the euro since its adoption has raised concerns regarding the fact that Spanish exports outside the European
De facto currency De facto currency A de facto currency is a unit of money that is not legal tender in a country but is treated as such by most of the populace. The United States dollar and the European Union euro are the most common de facto currencies. Andorra used the euro unofficially prior to June 2013, at which point the euro became its official currency. The euro remains the de facto currency in Kosovo and Montenegro. Countries using the United States dollar as their de facto currency include Aruba and Cambodia, where most hotels, restaurants, and transportation are priced in dollars;