> ## Documentation Index
> Fetch the complete documentation index at: https://sailia-mintlify-memberships-docs-1775143871.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Waitlists

> Let customers join a waitlist when an activity session is fully booked.

When an activity session reaches capacity, waitlists give customers a way to register their interest and get notified if a spot opens up. This helps you capture demand you would otherwise lose and fill cancellations automatically.

## How waitlists work

1. A customer tries to book a session that is fully booked.
2. They are offered the option to join the waitlist for that session.
3. When a spot becomes available — due to a cancellation or capacity increase — Sailia sends a notification email to the next customer on the waitlist.
4. The customer receives a link to complete their booking before the spot is released to others.

<Note>
  Waitlist notifications are tracked as `waitlist-notified` events in [meter usage tracking](/api-reference/meter-tracking#built-in-meters), so you can monitor notification volume.
</Note>

## Enable waitlists

Waitlists are configured at the activity level. When editing an activity, enable the waitlist option to allow customers to register interest for fully booked sessions.

## Managing the waitlist

From the bookings dashboard, you can:

* View the waitlist for any session, ordered by sign-up time
* See whether a waitlisted customer has been notified
* Manually remove a customer from the waitlist
* Monitor how many customers are waiting for each session

## Notifications

When a spot opens up, Sailia automatically sends an email to the next customer on the list. The email includes:

* The activity name and session date/time
* A booking link to claim the spot
* A deadline to complete the booking

If the customer does not book within the deadline, the spot is offered to the next person on the waitlist.

<Info>
  If you have [workflows](/integrations/workflows) configured, you can customize the content and timing of waitlist notification emails.
</Info>

## Related guides

<Columns cols={2}>
  <Card title="Activities" icon="calendar" href="/activities/activities">
    Set up activities and enable waitlists.
  </Card>

  <Card title="Online bookings" icon="globe" href="/activities/online-bookings">
    Learn how the booking flow works for customers.
  </Card>
</Columns>