I got the same call on my cell phone. My response was "since you have my address, simply mail the check".  That ended  the call.  This is a BBB issue as far as I am concerned.  Who else is he going to call who will actually give out their debit card number!?
RE: caller: Tax refund!

Same as above 7:15pm. Called private number, but gave me this number to call to have Grant I won put into western union. I had to paid first 150.00. Hung up.

Just like some of the others posted, I received a phone call from two men. One named David Benson and the other David Brown. The first man, Benson, had a heavily Indian accent. I could barely understand him so he put on David Brown. He had an Indian accent as well. They gave me the contact number 206-201-2309 along with a grant number. They also asked for my debit card number and last 4 digits of my social. They said I had to pay 150.00 for a security deposit at western union. And once I pay the security deposit, I would receive 6,000 dollars in grant money. They said they were located in Washington D.C. I traced the number and the number comes from Bainsbridge Is, WA which is nowhere near Washington D.C. Please don't be as stupid as me to actually give out your debit card number. Good thing about it is the debit card has a balance of 0!

I too received a phone call on my cell first by a blocked number from a David, no last name.  Also asked me for my bank account number or a Debit card number so they could transfer the $6,000.00 into my bank account.. NO WAY was I going to give out that information, so they offered the Western Union way, also telling me I had to pay $150.00 to Western Union, fill out a form and then I would receive $6,150.00 back.  I had a gut feeling this was a scam, I'm so glad I "googled" the phone number of 206-201-2309 first and saw all of these postings.  Same as listed above, these two so called "men" had Middle Eastern Accents, and I could hardly understand the first caller David.  Nick the call back guy, was a little easier to understand, but still had an accent as well.  He did offer to put my grant money on hold until I could come up with the $150.00, I told him I didn't have $150.00 right now. So he said to call him back whenever I got the money together and then he would transfer the money to me via Western Union.

SAME AS THE COMMENTS ABOVE....SEND THEM $150 VIA WESTERN UNION & IN TURN RECEIVE $6000.00 PLUS THE INITIAL $150.00.  WE JUST HAVE TO BE SMART....YOU CANT GET SOMETHING FOR NOTHING.