Tesco customers have been advised to check their bank statements after the retailer admitted shoppers are being billed twice due to a 'technical error'.
The British supermarket chain said an internal payments glitch had triggered a wave of overpayments on in-store purchases in the past week and was working to reverse duplicate transactions immediately.
Last month Tesco shoppers complained after card payments made at some of the retailer's petrol stations were taken months after they were made.
The retailer said the problem is nationwide and across Express, Extra, Metro, fuel stations and superstores, but online orders are unaffected.
A spokesperson refused to say how many customers have been double-charged, but MoneySavingExpert.com reported that thousands are thought to have been affected and that the issue may be ongoing.