Can my Prepaid MasterCard or Prepaid Visa Card ever carry a negative balance?
An authorization request for an amount that is greater than the account balance will be declined. However, occasionally, a merchant does not immediately send through an authorization request, meaning that while the money has been spent with a merchant, the account has not yet been debited. If another purchase is made before the authorization is put through, there is a possibility that your Card account could hold a negative balance. If that happens, you would be notified immediately to add additional funds to the account by e-mail and/or phone and/or postal mail.