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.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Avoid sign up duplication?Asked by viptlr on October 22, 2015 at 01:35 PM
Is there a way to avoid people from signing up twice?
You cannot really prevent a user to submit a form twice. But with the UNIQUE SUBMISSION feature will prevent a submission be submitted from the same computer or device twice.
You can find this if you press the PREFERENCE button on the top tool bar
In the FORM LIMITS tab you will notice this feature
You will notice 3 option:
* No Check will not verify any thing
* Loose Check control the cookie of the browser
* Strick Check will control cookies and IP of the device
For more information you may view our users guide, How to Set Unique Submissions on a Form.
Please let us know if this helps