Last year, when my dad and I were in the middle of selling the house, my dad had to get a few loans taken out to help pay for a down payment on the apartment we live in now.
He has paid off those loans, and now, he gets phone calls at work – about 4 times a week. He always gets phone calls from a person with an accent, with an American name. The person harasses him saying “You need to get off of work now and wire us money, etc etc.”
My dad has did researching, and it is illegal for a person to call and do such things. If the person says “Don’t call me at work,” they have to respect that. They CANNOT call back again.. but what the heck?
My dad has kept records of all of his loans he paid off.
He told me today that his coworker even received a phone call on her PERSONAL CELL PHONE.. from a person using the phone number from the old house my dad and I lived in … (no smiley can express how shocked I was at this). THAT NUMBER WAS DISCONNECTED when my dad and I moved! 
My dad has the phone number to the FBI fraud line, but not a lot can be done from there. He reports numbers to them, but a lot of the time, the people get away with harassing people. The buttheads use calling cards, so their phone can’t be traced.
Any advice? 