---
title: "Prevent bookings without an assigned customer on the Admin Panel"
slug: "prevent-bookings-without-an-assigned-customer-on-the-admin-panel"
updated: 2026-04-08T15:08:24Z
published: 2026-04-08T15:08:24Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.nexudus.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Prevent bookings without an assigned customer on the Admin Panel

This rule prevents admins from creating bookings if they don't select a customer before saving them on the Admin Panel.

---

1. Log in to [dashboard.nexudus.com](https://dashboard.nexudus.com/) if you aren't already.
2. Click [**Settings > Validation rules**](https://dashboard.nexudus.com/settings/3/0/0).
3. Click **Add rule**.
4. Click on **Manual entry**.
5. Name your validation rule.
6. Add a **Description** for your rule to let other admins know what it does at a glance.
7. Toggle on **This rule is active**.
8. Select **Bookings** in the **Record type**.
9. Add the **Error message to display if the validation rule is not met**.
10. Add the following code snippet to the **Formula** field.

```
record.Coworker <> null
```

1. Click the **Save Changes** button.

---

All done! We recommend trying to book a resource on the Admin Panel, leaving the **Customer** field empty. If you see your error message displayed as you try to save your changes, you're good to go!