How to not allow duplicate entries

Is there a setting that will not allow duplicates to sign up on my form?

Yes, this is possible to limit submissions based on IP address (one submission per IP) or browser cookies. Please see the next guide.

How to Set Unique Submissions on a Form

Alternatively, you might consider limit submissions based on a form field (e.g. based on email field).

How to set Form Limits Based on a Unique Question

Please feel free to contact us if you need any further assistance. We will be happy to help.