I realise that this question is subject to local trends (and I'm in the US), but I encourage people in other countries to submit their methods!
How do you accept packages/deliveries anonymously? Of course, there are mail redirection services, but a third party which corroborates with different parts of the chain can likely figure out your identity and what you have purchased/have incoming.
I haven't been able to find a good solution to this yet, and I believe the new rule in the US is that the receivers identity must be reported to the government? This (or a variation of this, I don't remember) is a recent event.
personally I use amazon (I know, but hear me out) to send my stuff into a locker so that no signature or interaction is required at all. they even ask me if I want it in the amazon branded packaging or not if it reveals what's inside which is nice.