For people getting unwanted packages, write "REFUSED" on the front in black marker and leave at your front door. The postman sends it back.
I used to have a lot of old folks living here and, as you know, they are targeted by companies with these kind of disreputable tactics. The fake billing and unsolicited packages continue to arrive long after the people listed have died. My postman told me about "REFUSED" and I'm grateful for it.
One word of caution, make sure it is something you definitely want to refuse. It's pretty easy to accidentally return something you are waiting for due to an unfamiliar return address.