A man called saying he was from Fed Ex with a check for $500,000.00 and needed a signature. He wanted to know if someone would be home to sign for it. I tried to call the number and it would not go through. I contacted the police and they said it was an untraceable number and it was probably the scam where they try to intimidate people to send money to get their "check".
My house, which until recently was my grandparent's house, gets calls from these clowns. This number is only one of several that they use -- it's a scam trying to get money from people, particularly those people who are easily manipulated, too trusting, or can be bossed around/intimidated into doing things over the phone. Unfortunately, my grandfather, being in his 90's and not having a great memory, lost several thousand dollars to these scam artists. They will not give you a real name (one man often uses the alias George Washington), and if you ask where they are from and who they are with they will make something up. I asked where they were located, they said Eerie Pennsylvania, but couldn't repeat the address they JUST gave me when I asked them for it, and gave me a zip code with too few numbers. They have threatened to send the state patrol after me for not complying with them too (obviously, I was not terribly worried about that). I believe they are actually located in Jamaica. They also don't seem to care about wasting their own time, as they continue to call my number even though I've made it entirely clear that I'm not playing ball with them. At one point the man on the phone got very frustrated and started questioning my intelligence, then my sexual orientation -- then even went so far as to pretend to be a girl. I also heard a "buddy" in the background trying to help him think of "funny" things to say.
My advice would be to never talk to them. Don't let them even know there's another person at the other end of the line if you can, otherwise you might end up on their calling list. I reported it the police expecting not much in the way of assistance, and that's what I got. There's really not much they can do. If you're on their list, it might be best just to chance your number. Even if you get one number blocked, they have several others they will call you from (many of them show up as private or unavailable on caller ID).