> For the complete documentation index, see [llms.txt](https://eventx-hq.gitbook.io/knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eventx-hq.gitbook.io/knowledge-base/registration-and-ticketing/ticketing-and-pricing/unique-attendee-registration.md).

# Unique Attendee Registration

## How Unique Attendee Registration Works

Organizers can enable this feature to ensure that there are no duplicated registrations with the same email address in their event.

## Steps

1. Under the Registration Form section > Click the edit icon\
   ![](/files/PrOl7jjXLuBu319T9Q6d)
2. Toggle on **Registration by Unique Email Address** > click **Save**\
   ![](/files/IyiOireRfLMQOwjm3VQL)

## Expected behavior

1. If an email address already exists as a Registered / Attended attendee on the People List, attendees cannot reuse the email address to register. The error message will be as below.\
   ![](/files/0z47peJX37moOhYzL4mw)
2. If ticket purchaser enters 2 similar email addresses when purchasing multiple tickets, there will be an error message as below.\
   ![](/files/6zESko5Gsop2WQh42Sde)

## Frequently Asked Questions

### Q: What happens when someone tries to register with an already-used email?

**A:** They will see an error message stating the email address has already been used and cannot register again.

### Q: Does this apply to ticket purchasers buying multiple tickets?

**A:** Yes. If a purchaser enters the same email address for different ticket holders in a single order, an error is shown.