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.
The only way they would be able to get your coupon codes would be to clone your form:
They would then be able to see the full setup of your form, calculations, coupon codes and all.
You can disable to ability to clone the form in your account settings:
It is highly unlikely that people would know to get your coupon codes in this manner but it's always best to cover all bases.
If you have any further questions, let us know and we will be happy to help.