Update passport or contact details in ImmiAccount
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Contact details
Update them in your account when they change. Inaccurate details can stop you receiving notifications.
Passport details
Passport details are entered when you set up the account. No steps to update them. A VEVO check can fail if old passport details are used after a renewal. See VEVO not working.
FAQ
Will an email change affect login?
See email already in use.