Received the same letter. Claimed that money was sent by Anna M Nichols. Had my last name wrong on the letter they sent, which was the first clue it was fraudulent. I have never dealt with Western Union, never sent or received money. Person actually called my home phone number. He actually had my social security number, which I refused to confirm was mine. Had Eduardo Zuniga Credit Card Collections Department with phone #888-985-7626 ext 1421; fax #888-690-2935; e-mail: eduardo.zuniga@westernunion.com. Said make payment payable to Bridgeton Accounting.

Recieved a letter supposedly from Western Union that said some money had been fraudulently sent to my account. They say it was sent by Diane Moon. They want me to send them money to Bridgeton Accounting, Henry Flores, acct:49395200
They also have a fax number of 636-916-8590. It all looks very official.
I will contact Western Union and warn them of this.

Got a fax with the same collection instructions. I never had any dealings with Western Union or received any money on the date they said. This is indeed a scam.

Me too.  I actually received a letter from "western union" claiming the money I received was fraudulently sent to me.  Called western union and they said the transfers cleared and had no notes.  Called the number and takes me to an inbox.  Western Union told me not to send any money until I talk to them again.  I will call again on Monday and get to the bottom of this.  It does look very official.  It may very well be a scam.  Trying to get a hold of the person that sent the money and figure out what's going on.

Western Union Financial