---
title: "Add Attendees to an Event"
slug: "mobile-checkin-add-attendees-event"
updated: 2026-02-19T16:51:07Z
published: 2026-02-19T16:51:07Z
canonical: "docs.blackthorn.io/mobile-checkin-add-attendees-event"
---

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

# Add Attendees to an Event

## About Walk-up Attendee Registrations

The Event Settings **Allow Walk Up Registrations** field lets Event Organizers determine whether Event Staff can accept walk-up registrations by showing or hiding the **Add Attendee** button, providing greater control over the registration experience on the day of the Event.

If **Allow Walk Up Registrations** is checked, Event Staff will see the **Add Attendee** button and can accept walk-up registrations on the Mobile Check-in app. This update changes the default behavior.

If **Allow Walk Up Registrations** is unchecked (new default setting), Event Staff can only check in pre-registered Attendees.

### Salesforce Versions Before 5.32

If the related Salesforce org uses an older version (prior to version 5.32) and doesn’t have the **Allow Walk Up Registrations** field, the **Add Attendee** button used for walk-up registrations will remain available on the Mobile Check-in app. Previously, the **Add Attendee** button disappeared when using older Salesforce versions.

## Register an Attendee

Complete the steps below to register an Attendee for an Event from the Mobile Check-in app.

1. Go to the Select Event screen.
2. Click on an Event. ![IMG_7127](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/IMG_7127.PNG)
3. Click the three dots in the top right corner. ![IMG_7128](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/IMG_7128.PNG)
4. Click **+ Add Attendee**. ![IMG_7129](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/IMG_7129.PNG)
5. Enter the Attendee’s information. ![IMG_7130](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/IMG_7130.jpg) **NOTE:** If the Event Settings’ **One Unique Attendee Email Per Event** = “True” (checked), then the Attendee will only be registered if their email address isn’t associated with another Attendee registered for the Event. The registrant’s email address must be unique.
6. Click **Save**. ![IMG_7132](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/IMG_7132.PNG)

The Attendee is now registered for the Event, and their Attendee record will be related to the Event in Salesforce.

![Mobile CheckIn App_Register Attendee](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/Mobile%20CheckIn%20App_Register%20Attendee.png)