A woman receives her pension pay off in Russian roubles in a post office at the Crimean city of?Simferopol March 25, 2014. Annexed by Russia, Crimea took the rouble as its official currency on Monday, but confusion over the exchange rate meant the hryvnia was still the main form of money changing hands. REUTERS/Shamil Zhumatov (UKRAINE - Tags: POLITICS CIVIL UNREST BUSINESS)