I've they want their device back, which they attached to my car (or planted into my apartment) I don't think I have any obligation to return it. Same if you sen

I've they want their device back, which they attached to my car (or planted into my apartment) I don't think I have any obligation to return it. Same if you send me some junk with a bill for which I never asked. What they can do, of course, is find a judge who orders me to return it. Could be, though, that they have to answer a few embarrassing questions in the process.