The process of dollarization can take multiple forms, including when a country adopts the US dollar either as its predominant currency, or establishes a bicurrency system with the local currency. This publication examines how to establish an adequate supervisory and crisis management framework in dollarized economies, particularly when central banks and regulators may be constrained in the use of standard monetary and financial policy tools. It is based on a paper produced by the IMF Executive Board, as part of the policy development work conducted by the IMFs Monetary and Financial Systems Department.