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.
I believe that you are referring to the Thank you message on your JotForm. If so, the answer is 'Yes' and you are right. Each JotForm has its own Thank you page and it is required to change the message for each form that you want to modify the message.
Hope this information helps!