It depends on the payment method you have used. If it is a card, as long as it has not been changed or cancelled it will be refunded without any problems. With PayPal, it depends on how long ago the initial payment was made, in this case we may need your bank details to make the refund. With bank transfer, we will always need your bank details. We will always inform you by email in case there is a problem and we need some more information.