DPR authorities have created a multi-currency zone in which both the rouble (Russia's currency) and the hryvnia (Ukraine's currency) can be used, and also the Euro and U.S. Dollar. Cash shortages are widespread and, due to a lack of roubles, the hryvnia is the most-used currency. According to Ukraine's security services in May 2016 alone the Russian government has passed US$19 million in cash to fund the DPR administration as well as 35,000 blank Russian passports.