Contrary to the intent of the designers of what was to be an irreversible currency union, Greece may well exit the Eurozone. This column argues that default does not inevitably trigger the introduction of a new currency (or the re-activation of an old one). However, if ‘de-euroisation’ is the end game, then a forcible (or compulsory) currency conversion is likely to be a central part of that process, along with more broad-based capital controls.