Same thing happened to me about half a year to a year ago. Got a call (if I remember correctly, but I am not sure, it was also a scammer claiming to work for BOL) offering a decent bonus. He gave me his number to call back, which (stupid me) I did. However, when I tried to call him back with the control number I couldn't get through. So I called BOL and discovered that the caller did not work for them. I quickly ran back to the Westernn Unionn office to quash the transfer. I told the clerks that I just had an argument with the person that I had sent the money to, which was a loan, and didn't think my friend was going to repay so could I have my money back please. They told me that the person in Costa Rica actually could pick up the money without the control number ( which is exactly the opposite of how I thought it was supposed to work). So they said that they just needed to call ** up and get the funds returned. But they couldn't get thru to ** for almost half an hour. Meanwhile, while standing there watching the clerk wait on the phone to get answered, I broke out in a cold sweat. Finally, ** answered the phone, said the funds had not been picked up and sent the $2500 back to me, minus the hundred dollar plus fee. So I have learned to make sure that I call the book thru its known number with deposit info.