Article L133-25 of the French Monetary and Financial Code
I. – The payer is entitled to reimbursement by his payment service provider of an authorised payment transaction ordered by the payee or by the payer who gives a payment order through the payee, if the authorisation given did not indicate the exact amount of the payment transaction and if the amount of the transaction exceeded the amount that the payer could reasonably have expected taking into account his past…