In a CEPR discussion paper Christian Bayer, Chi Kim, Alexander Kriwoluzky analyze redenomination risk during the European debt crisis and how the European Central Bank’s interventions affected this risk. They conclude that the risk fell in the case of Italy but increased for France and Germany.
From the abstract:
… first estimate daily default-risk-free yield curves for French, German, and Italian bonds that can be redenominated and for bonds that cannot. Then, we extract the compensation for redenomination risk from the yield spreads between these two types of bonds. Redenomination risk primarily shows up at the short end of yield curves. At the height of the euro crisis, spreads between first-year yields were close to 7% for Italy and up to -2% for Germany. The ECB’s interventions designed to reduce breakup risk successfully did so for Italy, but increased it for France and Germany.
See also this earlier blogpost.