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Step by Step Instructions
1. To change the credit card listed with your account, first login to your Client Area
https://customers.machighway.com/clientarea.php
(Client Area login details can be found in the email with the subject line "MacHighway Client Area Log In Details" )
2. Once you're logged into the client area, click on Billing > Manage Credit Card.
3. Once you've updated your card details click the Save Changes button.
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