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.
Currently this is not possible, what you can do is adding a text and show it when the terms check box is checked, to do it only add the "Text" tool to your form:
Then add a condition, if the terms check box is filled, then show the text:
The result will be that the text will be shown when the terms check box is checked, indicating that terms have been accepted:
Here is also a guide that will help you with showing/hiding fields based on user's answers: How-to-Show-or-Hide-Fields-Base-on-User-s-Answer
Hope this helps.