LeagueOne Release 8.9 allowed for the functionality of refunding registrations on cards. However, those who registered prior to LeagueOne Release 8.9 are unable to be refunded on cards as there was no support for a secure wallet id, which is required to refund in LeagueOne. Those who were registered prior to LeagueOne Release 8.9 will receive the "Support for refunds back to credit cards was added to LeagueOne as of Release 8.9.  Prior to this release the secure wallet id was not stored for the registration, so refunds for registrations processed prior to this release are not possible.” error if they attempt to refund a card.