To update your payment details, simply log into your online account with your email address and Butternut password. Click 'My Details' at the top of your dashboard, and then scroll down and click the button that says 'Edit your Credit Card details'.Click here to download a video that will run you through how to update your card Step 1:Step 2:Step 3:Pop your new details in and click 'Update', then you'll be good to go. Any outstanding charges on your account will be collected, and if your account was suspended it will be resumed so your deliveries will continue as normal.