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.
It is not possible to do since you will need to have access to the owner, if you can contact the owner or you are working on the same organization he/she could add you as a sub-user account and allow you access to edit and view the submissions of that form, here is a guide about how to do it: http://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User.
If you have the link for that form then you are able to clone it, only follow the steps on this guide to do it: http://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL.
Hope this helps.