Overview
The Mystery Customer or "?????" is a Special Customer in My Restaurant. It has a 1 in 20,000 chance (0.005%) to enter the Player's Restaurant. Upon entering, the Mystery Customer will bring along approximately 50 Ghost Customers. It can also be summoned by activating The Shrine, which has a 14-hour cooldown. When finished eating, the Mystery Customer will pay 50,000 
Cash. The pay of the customer is not affected by Golden Christmas Tree, Christmas Tree or Double Profit. Upon the Mystery Customer entering your restaurant, the player's screen will show "?????!" This message is shown in purple text, unlike other special customers, whose messages have white text.
Mystery Customer and Ghost Customer eating.
Gallery
Mystery Customer and Ghost Customer eating
Trivia
- Mystery Customers are slightly bigger than other customers.
- This customer resembles the player from the trailer of the game but does not have wings.
- This is the slowest Customer in the game.
- When the player's restaurant is visited by a Mystery Customer for the first time, the Roblox player is awarded the "???" badge.