1. Member States shall ensure that the payer can request the refund referred to in Article 62 of an authorised payment transaction initiated by or through a payee for a period of eight weeks from the date on which the funds were debited.
2. Within ten business days of receiving a request for a refund, the payment service provider shall either refund the full amount of the payment transaction or provide justification for refusing the refund, indicating the bodies to which the payer may refer the matter in accordance with Articles 80 to 83 if he does not accept the justification provided.
The payment service provider's right under the first subparagraph to refuse the refund shall not apply in the case set out in the fourth subparagraph of Article 62(1).