The Swiss franc is the official currency accepted for payment in two countries: Switzerland and the Principality of Liechtenstein.
It's the only state currency in Europe that is called ‘franc'.
The most unbelievable thing is that Switzerland introduced a negative interest rate on deposits. It means that not only will you not receive any valuable profit, but you will also be additionally charged for keeping your money in the bank. This decision was made by the Swiss National Bank (SNB) in order to withhold the rapid rise in the franc's value following the removal of the currency peg against the euro.