(1) This regulation applies where a payment order is initiated by the payer.
(2) The payer's payment service provider is liable to the payer for the correct execution of the payment transaction unless it can prove to the payer and, where relevant, to the payee's payment service provider, that the payee's payment service provider received the amount of the payment transaction in accordance with regulation 70.
(3) The payer's payment service provider must, on request, make immediate efforts to trace the payment transaction and notify the payer of the outcome.
(4) Where the payer's payment service provider is liable under paragraph (2), it must without undue delay refund to the payer the amount of the non-executed or defective payment transaction and, where applicable, restore the debited payment account to the state in which it would have been had the defective payment transaction not taken place.
(5) Where the payer's payment service provider can prove (as set out in paragraph (2))