Article R221-55 of the French Monetary and Financial Code
Any breach of the rules set out in Articles L. 221-13 to L. 221-17, Articles R. 221-33 to R. 221-35, R. 221-37 to R. 221-39, R. 221-42, R. 221-45, D. 221-46, R. 221-47 and R. 221-54 committed by the holder of a popular savings passbook account may result in the loss of interest, by decision of the competent administrative authority.