how can i keep my registration form from creating duplicate regsitrations

We are collecting registration information for a walk/run and the submit button is linked to the payment page.  However some folks are registering multiple times but are not paying multiple times.  Is there any field I can add that will flag that this email address has been used already or some other ability to keep a person from registering multiple times.

Thanks

WebAdmin

Hi EnonTab,

Thanks for contacting us.

Yes. It is quite possible to prevent users from registering multiple times. This will require you to set a unique question in your form. Let's say, you want unique email addresses in your registrations/submissions, you should set Email as the unique question in your form. To use such feature, please see the instructions below.

Let us know if you need further assistance.

Regards.