1.   Member States shall ensure that, without prejudice to Article 71, in the case of an unauthorised payment transaction, the payer’s payment service provider refunds the payer the amount of the unauthorised payment transaction immediately, and in any event no later than by the end of the following business day, after noting or being notified of the transaction, except where the payer’s payment service provider has reasonable grounds for suspecting fraud and communicates those grounds to the relevant national authority in writing. Where applicable, the payer’s payment service provider shall restore the debited payment account to the state in which it would have been had the unauthorised payment transaction not taken place. This shall also ensure that the credit value date for the payer’s payment account shall be no later than the date the amount had been debited.

2.   Where the payment transaction is initiated through a payment initiation service provider, the account servicing payment service provider shall refund immediately, and in any event no later than by the end of the following business day the amount of the unauthorised payment transaction and, where applicable, restore the debited payment account to the state in which it would have been had the unauthorised payment transaction not taken place.

If the payment initiation service provider is liable for the unauthorised payment transaction, it shall immediately compensate the account servicing payment service provider at its request for the losses incurred or sums paid as a result of the refund to the payer, including the amount of the unauthorised payment transaction. In accordance with Article 72(1), the burden shall be on the payment initiation service provider to prove that, within its sphere of competence, the payment transaction was authenticated, accurately recorded and not affected by a technical breakdown or other deficiency linked to the payment service of which it is in charge.

3.   Further financial compensation may be determined in accordance with the law applicable to the contract concluded between the payer and the payment service provider or the contract concluded between the payer and the payment initiation service provider if applicable.