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.
A sub-account users refers to accounts that have access to another account's form(s).
For example Account A wants to share a form with another person that has Account B, then in order to do this Account A will need to add Account B as a sub-account on his own account in order to share the form.
You can check the following guide: http://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User to see a more detailed explanation on how to share forms with a sub-account user.
Hope this answers your question.