You can change your payment card details via a MiPermit portal or via the iOS or Android apps.
Login to a MiPermit portal and select the 'Billing Details' option. In the 'Secure Payment Details' section, you can opt to remove your payment method or edit the payment method. Editing the details will ask you for your card details and to select which merchants to authorise your card for use with (more information on this is available on screen at the time of choosing).
Please note that we do not store your card details. The details you enter are sent directly to our payment provider (SagePay) and we are given an encrypted authorisation code which we can then use to take future payments.