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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    Invalid Merchant Configuration

    Asked by VCOMPostBac on October 01, 2013 at 03:38 PM



    I've set up my form to use PayPal Pro to collect payment for an application processing fee. When I've just now tried to process a payment as a test, I see an error message that says "Invalid Merchant Configuration" and I'm unable to process the form.


    I've set up my form with the API information from PayPal and when I click the "test integration" button, I get a successful message. 


    Why am I not able to process the credit card charge?


    We really need a response ASAP as our application is scheduled to go live within the next 24 hours or so. 


    Thank you,




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    JotForm Support

    Answered by jonathan on October 01, 2013 at 06:03 PM

    Hi Alisa,

    Since there is only one item in your payment field, you have to make it selected by default so that when form is submitted, the payment field will be used. Please refer to the image below on how you can do this



    Please inform us if you need further assistance.