Important Note
We highly recommend turning on the feature for unique email addresses for attendees, as having a unique email address is required to access the event. The email address is the attendee's identifier. If attendees are sharing an email address, they will have issues as they are sharing a profile. They may have incorrect names when they check in and claim their badge, and when they log in to the app.
Requiring ticket holders to have a unique email address can limit attendees to one ticket per event. This is ideal if an event has a limited capacity. Another benefit is that you can ensure that attendees cannot accidentally buy multiple tickets under the same email address, making your analytics accurate without duplicates.
Notes:
This feature applies to tickets only, they can still buy multiple add ons under the same email address.
The rule still applies when the order is later updated with ticket holder email addresses, so only one email can be registered per ticket.
Ticket holders can go into their account, but changing a holder’s email address to one that’s already in use won’t go through.
The rule also works in the admin console, staff portal, and admin app. The platform recognizes when an email address has already been used for an existing ticket to the event.
Canceling a ticket frees up the email address, so a new order can be placed for the same attendee.
For recurring events, this feature will allow them to buy 1 ticket per event, not per day. We are working on improving this feature. Stay tuned!
Restrict Attendees to Register Only Once With the Same Email Address
Go to Registration > Order Form in your admin console
Click Settings
Turn on the toggle for Each Ticket Holder Must Have a Unique Email Address
What happens when there's an attempt to register again?
Since they already have a ticket for the event, they can no longer get another ticket under the same email address.
If there is an attempt to register them again, whether it be through the registration page, the admin console, or the staff portal, the registration wouldn't go through. They will get this error message:
Scenario | Error Message |
Single Ticket in an Order |  |
Multiple Tickets in an Order |  |
Import Through CSV
It wouldn't allow you to upload the attendees in the CSV if at least 1 attendee already exists. |  |
Import Through HubSpot, Salesforce or Marketo integration | There is no error message, and it may even give you a success message in the CRM, but the order will not be created in Accelevents. |
Will there be duplicates if attendees are imported?
No. If attendees are imported through CSV upload or through integration, it should not create duplicate attendees if this feature is enabled.
Restrict Ticket Buyers to Buy Only Once With the Same Email Address
This setting will not allow a ticket buyer to buy tickets again if they previously bought tickets, regardless of whether they bought the tickets for themselves or for other attendees. If in a previous order, their email address is only in the holder information, then they can still buy a ticket because historically, they have never been a buyer of a ticket.
Go to Registration > Order Form in your admin console
Click Settings
Turn on the toggle for Each Ticket Holder Must Have a Unique Email Address
What happens when there's an attempt to purchase again?
Since they already have an order for the event, they can no longer purchase another ticket under the same email address.
If there is an attempt to purchase again, whether through the event page, the admin console, or the staff portal, the purchase will not go through. Instead, they will see this error message:
Scenario | Error Message |
Buyer selects any ticket using the same email address | 
|
Import Through CSV
It wouldn't allow you to upload the attendees in the CSV if at least 1 attendee already exists. | 
|
Import Through HubSpot, Salesforce or Marketo integration | There is no error message, and it may even give you a success message in the CRM, but the order will not be created in Accelevents. |