|Voted Best Answer
This is a SCAM to get $26 from you. They really are not going to send you $16,775.190.00!!! You won't even get a dime back from these sleazy crooks. Do not give them any cash or even a money order! And particulary DO NOT give them your credit card or banking information!
PLEASE: Immediately report them to your state or county or (best) federal consumer affairs office. The legal authorities will take care of tracking them down and hopefully sending them to jail. Mail fraud is a serious offense.
You can find information at: http://www.ftc.gov/bcp/consumer.shtm