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.

  • Profile Image

    How Does Unique Submission Work?

    Asked by msfirth on April 20, 2010 at 05:25 PM

    I can not find any information about how the Unique Submission works.

    Does it only let one submission per IP address, does it check to see if ALL the data being submitted is duplicated???

    Please can you explain what the method is so I can decide if i should use it or not.

    Many thanks,


    PS. Have you ever thought about disabling the Submit button after release to prevent accidental duplications?

  • Profile Image
    JotForm Founder

    Answered by aytekin on April 21, 2010 at 03:39 AM
    When you enable Unique Submission, you will see two options:
    - Loose Check- Strict Check
    Loose check only uses cookies to check uniqueness. Strict check also uses IP addresses.

  • Profile Image

    Answered by msfirth on April 21, 2010 at 08:35 AM
    Does the system just check to see if an IP address has submitted a form already or does it check to see if the form data is identical? the peopel filling out my form are required to fill out the form again if they need another booking for a return trip. I only want to prevent Unique Submission if the form data is identical!

    Mark :o)
  • Profile Image
    JotForm Founder

    Answered by aytekin on April 22, 2010 at 07:28 AM
    There is no such case. If you only want to check for exact same form submission, none of these will work for you. We do not have such check.