What acceptable non photo ID can I use to get my PO Box key?

I just bought a PO Box and I am 18 and I was wondering can I use my school mail as an ID to show my current address? Or is there anything else that I can use because I do not have a current lease, mortgage, deed or trust, I have not voted, and I don t have a home or vehicle insurance policy. Anything else that I could use?…

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