undercovershopper
nounUK /ˌʌndəˈkʌvəˌʃɒpə/
US /ˌʌndərˈkʌvərˌʃɑːpər/
A person who pretends to be a normal customer to secretly check how good a store is.
The undercovershopper bought a toy and later told the manager that the cashier was very polite.
OTHER MEANINGS
2. Someone who secretly tests a service to see if workers follow the rules.
An undercovershopper visited the restaurant to make sure the food was safe.
3. A person hired to act like a buyer and report on how a shop treats people.
The company sent an undercovershopper to see if the staff greeted everyone kindly.
4. A hidden checker who visits a place to judge its quality without being noticed.
The undercovershopper wrote a report about the messy shelves in the store.