There is no one definitive answer to this question since it depends on the specific circumstances and industry in which mystery shopping occurs. Generally speaking, mystery shoppers are individuals who are not employed by a company but instead wander around looking for hidden treasures and secrets, often without being specifically told what they are supposed to find. Many experts believe that mystery shoppers can be very helpful in identifying potential scams and other potential problems in the industry, so it is generally recommended that anyone considering mystery shopping do their research first.