but most do.
If you are avoiding service,
process servers are looking for ways to verify that you live at your address.
Mail is often the quickest way.
If you have mail hanging out or on the ground or anything like that its fair game.
A process server would just put on the affidavit "visible mail".
Talking to neighbors,
or talking to a co-resident are ways servers verify that you live at a home.
Unless you are compeletly off the map and dont have anything in your name and no one knows you,
a server is going to find out if you live somewhere.