Supermarkets including Asda, Sainsbury's, Tesco and Morrisons have changed how drivers pay for their fuel.
Previously, all Pay at Pump transactions were authorised by requesting a £1 transaction from your card issuer before taking payment for the value of the fuel one to three days later.
But new rules imposed by Visa and Mastercard last year, mean that the pre-authorisation has changed to £99 which means your bank may create a temporary hold of up to £99 while you fill up.
