Yes. I’d like to think having a mobile phone would be enough but there’s still how work can write you a check and how you can deposit it. Not sure if any bank will go without a fixed address.
Well the only problem here is that general delivery is still not eligible for any of the main things people need an address for, like ID, tax docs, etc. Even if you want to pay for a PO box (which also doesn't satisfy those requirements), you need an address to register for one.
I really wish there would be more work to try to at least add some kind of alternative path here, given America's growing homeless population. Leaving things to the goodwill of family or friends seems to me like a dereliction of duty by the state.
When we were making a long move and temporarily without a stable address I looked into getting a PO Box and it seemed impossible without a real address.
I ended up finding some kinda sketchy-feeling services aimed at people RV living, and not much else. I wasn’t able to find an official solution to the problem of “I need to receive mail but have no address” (there may be one, but in solid 60-90 minutes of searching I didn’t find it, but did find a lot of people complaining about the problem)
I'm not sure if you need an address to sign up for a private mailbox at places like UPS Stores.
But a lot of people might receive mail at a friends' address with permission. But, you still need to have a friend or family with a stable address who is willing to help.
In the past this was pretty lax (I've had a long-term box at a Mail Boxes Etc. that then became a private mail boxes place that then became a UPS Store) and they didn't really care when I first opened it. Now there's a push for KYC also; we got a sheet the other day asking to verify our physical street address, something I never personally got in the years I've been there. Apparently new regulations or something, they said.