The sale will be denied. To avoid this, please be sure to check your account balance prior to using your card. Please be aware of the standard prepaid card processing procedure that allows restaurants to reserve up to an additional 20% or more above the amount of the bill to cover additional gratuity left on the prepaid card receipt. However this is temporary. Your card account dollars will remain with your card less the actual gratuity you leave. Those funds may not be available for up to 72 hours. To insure that you don't exceed the available balance on your card, the amount of the card balance you use will be adjusted to reflect the 20% or more add-on.