> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.cal.id/sitemap.xml
> Use this file to discover available pages before exploring further.
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# Verify Email on Booking Page before the Booking

**Requires booker email verification** makes guests enter a code before confirming, ensuring every booking is tied to a real, reachable email.

| Why use it

* **Kill spam & fake bookings:** blocks bots using non-existent addresses.
* **Guarantee deliverability:** invites and reminders will actually arrive.
* **Protect sensitive meetings:** the booker is who they claim to be.
* **Reduce no-shows:** the extra step filters out low-intent bookers.

| Set it up

1. Open **Event Types** and click the event.
2. Open the **Advanced** tab.
3. Toggle **Requires booker email verification** **ON**.
4. Click **Save**.

![](https://storage.crisp.chat/users/helpdesk/website/-/6/f/1/c/6f1c2c7b8034d000/image_484bd.png =1163x615)

| How it works

After filling in their details, the guest enters a **6-digit code** Cal ID emails them. Once it's correct, the meeting confirms and lands on both calendars. If they don't enter it in time, the slot stays open for others.

| 💡 Tip

Verification adds a little friction — great for public links where spam is a concern, but you may leave it off for known clients or internal meetings.