From Analytics > Reports > search for Failed membership renewals. This report lists all failed renewals with the amount due and the 'rerun status'. To manually rerun one, click on the customer.

From a customer's profile click Activity > Renewals > locate the failed renewal > click Retry charge.

A pop up will show with the option to edit the card on file and to schedule the renewal for a later date if needed.

To change your Momence system settings that automatically retry a failed renewal, click Settings > General setup > scroll to the bottom and locate Membership renewals. From here you can enable renewal retries and choose whether a customer gets to keep their bookings when their card fails. Customers will be prompted by email to upload a new card and Momence will queue up the auto renewal to retry.