I just received the same message. Computer voice stating there was a lawsuit against me and if my attorney or myself call back, then it is on my as the lawsuit unfolds.
Received the same recorded message today threatening a criminal law suit against me, my attorney or myself needs to contact them immediately or whatever unfolds in on me.
I received a call today from this same number stating the same thing about a law suit and even went on to say they've been to my house twice to try and deliver the "letter". It was for a tax year when I wasn't even working. My wife called the number back and a "Jeff Adams" answered and he sounded foreign. My concern is they had my physical address. They'd also left a voicemail and it sounded like a computer generated message.