The French banking regulator, ACP, said today that UBS France was warned by autumn 2007 about inadequate procedures and did nothing for 18 months. The statement did not specify whether there had been any illicit activity.
French prosecutors are separately investigating UBS France and three executives for complicity in illegal business dealings.
In a statement, the Swiss bank said its French subsidiary has been under new leadership since 2012 "and has continuously strengthened its rules and processes."