Caller with a thick unknown foreign accent identifying herself as being with FNMA and is calling about a $4,300.00 overdue mortgage.  Interesting thing is that I have no mortgage to speak of.  You leave messages and they are not returned.  It sounds like an offshore scam to me.  Scams like this are usually based in Nairobi and the calls made are mirrored off any number of telephone servers throughout the world making them very difficult to trace and locate.