Because TallyMoney is in the business of protecting your money from the risks associated with debt-based fractional-reserve fiat currency, we do not offer an overdraft facility. Many ‘pay at pump’ machines perform an overdraft check instead of a balance check, meaning you will be unable to use your TallyMoney Debit Mastercard at these stations irrespective of your tally balance. Of course, you can still fill up your car using your TallyMoney Debit Mastercard; you’ll just have to go to the counter to pay.