I had a couple recorded on an answerphone just after I had a stereo possessed. The stereo possession went on for months, but after I removed it and gave it away to students I started getting answerphone messages left while I was at work.
Mostly it was static but the last one was clearly a "get out". I traced the call, and it was from my own landline from the house while I was out at work. This alone is impossible, but more so is that you cannot dial out and pick up at the same time to leave the message, so that is doubly impossible !