Payments can fail for a number of reasons, the most common one being that the customer did not have the funds available.
When this happens we will not try to retake the payment but will leave it up to the merchant to decide the best time to retry.
If a payment fails GoCardless will notify you via email. You then have the option to login to' GoCardless for Xero' and manually request we take the payment again.
Payments can be retried from our Invoices page. Any failed payments should show under the pending section and can be retried by clicking the Collect Now button.
If it does not appear, then it is possible the customer has cancelled their mandate and you will need to ask them to sign a new one.