The Zimbawean government is likely to adopt a dual currency system that could bring back the Zim dollar alongside the United States currency if the government fails to resolve the liquidity crisis… Read More here:
http://www.newzimbabwe.com/news-12984-Liquidity+crunch+seen+forcing+Zim$+return/news.aspx
https://www.newsday.co.zw/2013/03/21/zimbabwes-liquidity-crisis-an-economy-under-stress/