By creating a custom microsite, your customers can register their wristbands in advance upon receipt. This allows you an opportunity to collect additional information about your ticket holders, not collected during the purchase process.
You can brand this however you choose and this is an opportunity to sell branding to a sponsor.
From here, wristband holders can register their wristbands in advance, manage their balance and attach a credit / debit card to the wristband for automatic payments on-site at your event.
After the event, the microsite is where a wristband holder would come to request a refund.