Mystery shoppers question?

I want to become a mystery shopper. I got a check in the mail about a year ago for over 4000 dollars and all I had to do was call so that I could cash the check. I called and they said I could cash it but me being stupid never cashed it. There were some stores I had to go to and a certian amount I was supposed to spend at each store and then evaluate the store, but I don't remember the name of the company and I think I woul like to try that again. If you know the name of the company or any other company that doesn't require you to use your own money as I don't have alot of it please let me know.