If your addresses have not expired and are not expiring soon, you may be seeing this message on ACORN if you either have a mailing or permanent address on file, but not both:
"Your permanent or mailing address has expired, or is expiring soon. Please update your address now. Keeping your addresses up to date will ensure you  don't miss any important payments or communications from the University."
To dismiss this message, please add both a mailing and permanent address to your Profile & Settings area of ACORN via the "Add New" button on the Address page.