I have received several messages from a man named Sam Smith with a heavy Indian accent.  He threatens to sue me, have me arrested, show up at my work or home.  The first couple of times that I received this call, I was terrified every night when I was walking to my car in the parking lot at my work.  In his message, he wishes me luck if I do not respond.  Once, when I received a couple of calls like this a year ago, I called back and the man I spoke to refused to send me anything in the mail because he said that it was unnecessary for me to have anything sent to me.  I ended up hanging up on him.  The calls eventually stopped, but now, they are starting up again.