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.

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    Form Error: Form ID did not match

    Asked by WashUGME on July 01, 2015 at 03:18 PM


    I just sent out an email with a JotForm PDF attached and the recipients are receiving an error message when they go to submit the form.  The error message reads:



    Form ID did not match. Form ID: Form Name: 51204881492152


    Please let me know how to fix this.

    Thank you,


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    Answered by Ben on July 01, 2015 at 04:21 PM

    Could you please tell us Carol how the error happened?

    From what you have mentioned, it seems that you have sent an email to your clients that has a fillable PDF of your jotform and when they submitted that PDF file, they got the error you have mentioned above: "Form ID did not match"

    Is that correct?

    Just to mention, I have just tried to fill out your jotform http://www.jotform.us/form/51204881492152 and it is working properly for me.

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    Answered by WashUGME on July 01, 2015 at 05:21 PM

    Hi Ben,

    That is correct.  I saw that you filled out a form ~ thank you for troubleshooting it.  I'm not sure why they are getting the error message. 

    Thank you,


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    JotForm Support Manager

    Answered by Jeanette on July 01, 2015 at 09:59 PM

    OK, so I assume you've been sharing only the direct link, instead of the PDF http://www.jotform.us/form/51204881492152

    Does any of your users still have the problem? If so, can you ask them which browser they use?


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    Answered by WashUGME on July 02, 2015 at 01:09 PM


    I save the from as a PDF and rename it.  I then attach the PDF to an email.  They open the attachment, complete the form and submit it.  The most popular browsers used here are Firefox, IE and Chrome.  Is there one browser that works better than another?

    Thank you,


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    JotForm Support

    Answered by BDAVID on July 02, 2015 at 02:12 PM

    We recommend using Chrome and Firefox, sometimes, the issue might be related to browsers cache issues, clearing cache would solve the problem. Is this issue still happening? It's important for us to know  the exact browser version, and also operating system, that was used in order to reproduce the issue and fix it.