CADMV claims on their web site that they cannot accept a P.O. box as a residence address. I have yet to find anything in California state law supporting this policy, though IANAL. Their enforcement seems to be quite lax.

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Tangurena2 2 hours ago | parent | next [-]

It is a REAL ID requirement. It is federal law. States issuing REAL ID compliant identity documents must mail them to your physical address. USPS provides that data for address validation.

DPVCMRA = delivery point is a commercial mail receiving agent. Any sort of location with PO Boxes.

https://developers.usps.com/addressesv3#tag/Resources/operat...

Disclaimer: I used to work for my state's DMV.

	▲	lrvick 16 minutes ago \| parent [-]
		As someone who spent years homeless off and on, I resent REAL ID discriminating against the unhoused, so I choose to use my privilege to reject it. I do not have or need REAL ID and my passport does not need a current residential address.

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lrvick 6 hours ago | parent | prev [-]

You cannot literally use "P.O. box" but if you use the virtual street address service the USPS offers now it works just fine.