What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Can you prevent duplicate entries?Asked by ndhaap on July 06, 2015 at 11:55 AM
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.
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.