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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.
How not to allow someone to re-submit the same information such as the Name?Asked by Marwan Alakteb on June 25, 2015 at 07:36 AM
You have to set a limit in the form based on a unique question. In this case, you should select the Name field.
This guide should help you how to do it: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question.
Let us know if you need further assistance.