Special customer blind boxes can be found in the Customer Store. Buying a blind box will get you a new special customer. See below for details:

1. Every time you buy a blind box, you will unlock a random special customer contained in that blind box.
2. Each blind box contains several special customers. Different blind boxes contain different special customers.
3. On the first day of every month, the blind boxes will rotate.
4. When you open a blind box, the chance of getting each special customer is the same, and you will not get a special customer that you already have. If you already have all the customers in the blind box, then you will be unable to buy it. You will need to wait until a blind box with one or more uninvited customers becomes available.

Make sure to update your game to the latest version and connect online to obtain the latest blind boxes!