Can you prevent duplicate entries?

Is there a way to allow only one entry per email or perhaps a way for people to modify their submissions?  We use JotForm for registration and have found that when people want to change something on their form, they will submit a completely new form.  The creation of duplicates in our reporting is a hassle.

Thanks,

Trisha

Hi,

If you don't want your user to input multiple submission based from a specific question, that is possible by following this guide: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question. Following that guide, let's say you don't want to let a user to submit the form if the email he entered is already in your records.

If you want your users to edit or update their submission, you can give them the edit link, here's a guide on how to do that: http://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date 

Let us know if you need more information on this.