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State ID, Drivers License, or any type of Utility Bill work well.
Try any mail proof that you have had sent
Try a current paid bill. If sec. of state takes them they might too.
Do they double check when you arrive?
When I bought my tickets online they used my billing zip code as confirmation that I’m an Illinois resident.
Maybe, a utility bill that is in your name, and a copy of your apt lease.
A state ID or Driver's license
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