Originally Posted by
cjtibbett
Do you think this is acceptable behaviour?
No, clearly not. That said, these things do happen when businesses balance their books at year end -- I recently received an unexpected cheque because a deposit I'd paid for a vehicle hadn't been correctly applied to my account.
There's not much you can or should do about it unless it's actually cost you money, though. That might happen if this kind of correction caused a guest to miss a deadline for claiming expenses, or made it necessary to submit a revised tax return, or caused an account linked to a debit card to go into the red. In that case I'd certainly ask Accor to cover the consequences of their accounting error.