Cuban convertible peso

The convertible peso (sometimes given as "CUC$" and informally called a "cuc" or a "chavito") was one of two official currencies in Cuba, the other being the Cuban peso. It has been in limited use since 1994.
On 8 November 2004, the U.S. dollar was officially no longer accepted in Cuba (though "unofficially" it was). Its value was increased to US$1.08 in April 2005, but went back to US$1.00 on 15 March 2011.
On 22 October 2013, it was announced that the convertible peso would end, being gradually unified with the lower-value Cuban peso. On 10 December 2020, it was announced that the convertible peso will no longer be in effect, from 1 January 2021.