Had two phone messages, looking for someone of a similar name to a relative of mine. I called them back the second time, since they at least had pronounced it correctly this time, and gave a middle initial and age. The callerid was 1-615-469-5268 and the callback number was 877-289-4690, plus an extension. The message was from one Sarah Danvers, "handling an urgent situation out of" a city in one state, wanting a statement on the person's behalf regarding it. When I called, the receptionist asked for a "case number" and I gave the "extension". The woman that then picked up could have been the same one that left the message, but I can't be sure. She said she needed a statement from the person by 6pm tomorrow about the matter they were handling out of <a DIFFERENT state this time>. So it seems they can't even keep their story straight. Although, both states mentioned had relevancy to the relative, so I expect that helps add "believability" to the story. She said she had already had one person call in from <my relative's area code> but didn't understand why they wouldn't talk to her. I spoke to my relative, who said this Sarah person had called several other of our relatives, and had even called them directly, so they clearly had the right number, but when asked what it was Sarah wanted, she wouldn't tell them anything.
So, similar story to the others, but they did appear to act reasonably polite; there was no yelling or anything like I've seen in the 877-320-5615 notes.