Questione giuridica chiave
Whether the bank had to correct or cancel allegedly unauthorized account and depot bookings as performance of the mandate or account-rendering duty.
Decisione estratta
A duty to render account under Art. 400 OR is satisfied by providing account and depot statements; it does not include correcting or canceling bookings already made.
Motivazione estratta
Account rendering informs the client about the bank's activity, even if that activity may not have complied with the mandate. The sought stornierung and recalculation are not part of the account-rendering duty.