Comment by Zancarius

The whole system is broken in hilarious ways.

Unrelated but similar: I live in a rural area, so we don't get street delivery of mail. Instead, we need to apply for a PO Box. Every year, to verify that only residents are using the PO Boxes, the Post Office sends out a renewal form, and you have to show up with a current bill and your driver's license. The latter makes sense—the State, presumably, goes through the validation of your address, and you sign their forms under penalty of perjury, etc., the the former is hilarious.

So, to receive the very bill used to authenticate "current residency," the bill has to go through the Post Office (remember what I said about no street delivery? anything that's mailed to our street address goes... to our PO Box!), and then we show it to them to validate that we are receiving email to that address—which cannot be independently validated outside the driver's license.

The PO Box we're renewing is therefore used to validate itself. And the fun part is that if you delay in returning the form, they'll block off your box.