I'm always seeing people scammed by fake secret shopper jobs.
Others are losing money to rip-off sweepstakes and contests.
If you ever get a big check as payment before work is done, or told you've won something you didn't enter, or are asked to pay for either of these, it's a scam.
Check here for legitimate contests through about.com.
And click here to find legitimate secret shopper jobs across the country through the Mystery Shopping Providers Association website.
There are more secret shopper jobs in the Valley through Primo Solutions through this site.