SEPA payments: payments can take between one and two business days to reach the payee’s payment service provider/bank.
SEPA Instant payments: payments, if successful, are credited to the payee within 10 seconds of the payment being made, 24/7, any day of the year.
You will get a notification letting you know if your SEPA Instant payment has been successfully processed or if it has been rejected. If a payment is rejected, the notification will say why the SEPA Instant payment was rejected.