I get 3-6 offers per week to perform 'mystery shops'. They send me money orders, traveler's checks, certified checks, which I am suspposed to deposit in my account, deduct a few hundred for myself and send the balance by Western Union (always Western Union!) to someone.
I do apply for the job, I do receive the Fed Ex, Priority Mail, or USP package and there it ends. I have cost them real money and time that they could have used to scam someone else. HA! I HAVE CLOSE TO $80, 000 IN Fake money and dozens of envelopes from scammers.
The police, fbi, cia, postal inspectors, NO ONE cares enough to even answer my emails. My former bank, the Chase cared enough to close my account when I did send a check in for collection, but that's all they did, they made no attempt to track down the real criminals.