The Visa Account Updater (VAU) service helps take the hassle out of keeping merchants up to date with your card information. When you get a replacement card, VAU automatically updates your card number and expiration date with participating merchants you've authorized to charge your card to ensure any automatic payments continue without interruption, such as subscription services or insurance premiums. As a benefit, all MIDFLORIDA credit and debit cards are automatically enrolled. Not all merchants may elect to participate.