Montenegro and the euro Montenegro and the euro Montenegro has no currency of its own. From 1996 the Deutsche Mark was the "de facto" currency in all private and banking transactions and it was formally adopted as Montenegro's currency in November 1999. The mark was replaced by the euro in 2002 without any objections from the European Central Bank (ECB). The European Commission and the ECB have since voiced their discontent over Montenegro's unilateral use of the euro on several occasions, with Amelia Torres, a spokesperson for the European Commission, saying "The conditions for the adoption of the euro are clear. That means, first
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;