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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.

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    What does Security header is not valid mean?

    Asked by anna317hotmailcom on December 01, 2015 at 12:36 PM
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    Answered by victor on December 01, 2015 at 02:15 PM

    I would suggest contacting PayPal support to see what is the exact issue. This I believe that this is an error caused by some settings in your PayPal merchant account.

    Also if you can give us a link to your jotform in the meantime we could take a look at it to see if there are any issues with its settings.

    Also, if you can direct us step-by-step what you are doing to get the error.