# Customers

In this section of the documentation, you will find information regarding the **Customers** sub-menu of **HBook** menu. You can here manually manage the customer details and list.

![customer-menu-item.png](./attachments/customer-menu-item.png)

* * *

This is where are listed all your customers. A customer ID is associated to a customer email, which means that if a reservation is done with an existing customer email, any information associated to the “Customer” in [HBook > Details Form](../hbook-documentation/forms-customization/customer-and-booking-details-form.md) will be updated by HBook if modified.

![customers-table.png](./attachments/customers-table.png)

1. You can search the customers table. You can as well sort the customers by ID or last name.
2. You can check the history of reservations of a customer. If you click on the number of reservations, you will see the list of his reservations with all details.
3. It is possible to **edit** customer details or as well to **delete** the customer, which will remove it definitely from the list.

> [!INFO]
> **Good to know!**
> - Any information of the [Details Form](../hbook-documentation/forms-customization/customer-and-booking-details-form.md) associated to the “Customer” will be updated each time a new reservation is received with this customer email address. If the field is empty, HBook keeps the previous information. If it is filled, we update the data for the customer.
> - If you work with agents that make bookings for 3rd party, we recommend creating another email field for the booking agent email.
> - If you enter reservations from the back-end, leaving the customer email field empty will allow you to create a new customer, only if you wish to.