Asda has made changes to its Rewards app amid claims that money saved had disappeared and even been spent far away from customers' homes.
Shoppers now need to supply their mobiles to use the loyalty scheme after it tightened its security, although Asda has denied there has been "a widespread security issue" with its app, pointing to weak online personal security as the reason why dozens of users were unable to access their accounts or use log in details .
MoneySavingExpert has reported that users of its loyalty scheme will now need to input a mobile phone number into the app before being given receive a one-off passcode. This will be sent via text to input into the app before you can continue to use it. You will only be asked to do this once, and should only be asked to do this again if you change your password or if they want to log into the app on a different device.