I hear from a lot of people who want to become mystery shoppers, but say they do not know how to find secret shopper companies that do not charge.
They are on the right track knowing that they should not pay to sign up with a company. Legitimate mystery shopping companies do not charge you to register.
The companies that charge may be providing a service (which you do not need) or they may just be out-and-out scams. In either case, you should never pay a fee to any company claiming to offer mystery shopper jobs.
So how can you find the legitimate mystery shopper companies that do not charge?