If you fall for it, you rush to buy the card then call the "clerk" back at the number he or she provided and spill the card's serial number.
Say so long, adios, farewell and bye-bye to your $400.
"When the serial number of the card is given to someone or falls into the hands of a scammer, they have instant access to your money and can drain the money from your card," Barlow said. "Unlike a credit card, the transaction is untraceable and cannot be reversed or challenged."
The rule of thumb? Never give a MoneyPak serial number to anyone you don't know.
None of the individuals who reported receiving these scam calls were actually called for jury duty. Had they not panicked, but called the U.S. District Court first, they would have known that and not be out their hard-earned dollars.
"[If someone fails] to appear for jury duty, a court official will contact them to determine why they failed to appear," Barlow said. "Individuals are never fined for non-appearance without receiving an order from the court directing them to appear before the judge, the opportunity to explain their non-appearance to the judge, and a written order from the court setting the amount of the fine."
Most importantly, payment of a fine is never demanded via a telephone call.