ST. LOUIS (KMOV) -- A new rule will impact Visa debit card customers who use their card at a gas station pump.

Some gas stations will hold a higher amount -- in some cases $500 -- above the amount of pumped gas.

The hold will be placed on the customer’s card for two hours.

Under old rules, gas stations could hold an extra dollar to $75 for up to two days.

If a gas station is still working under the old rules, customers could be vulnerable to large overdraft fees.