JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
I'm not sure if I understand your query correctly. Do you mean to say that you want to display a message to the form filling person if the form registration is closed? If so, you may set an expiry date to your JotForm or limit the form to receive a number of submissions and display a message from the Form Preferences.
Please see the screenshot below :
Please refer to the guide below that can help you with limiting the form submissions.
Hope this information helps. Let us know if you are referring to something different or need any further assistance. We will be happy to help.