Site visitor paid Paypal without submitting form?

This is a rental application, most of the questions are required. Once they hit submit they are redirected to a paypal payment page. My client is telling me that someone paid the application fee via paypal, without filling out the forms questions, ie, my client did not receive a form submission email, and there is no record of one on jotform. I'm curious how this would be possible? I didnt think it was possible to pay that paypal fee without filling out the required questions, the form gives an error if you hit submit and some questions are blank. Has anyone encountered this issue? Thank you for any suggestions.

Hi,

I cloned your form to see if there was anyway I could bypass submission to get to the payment page and I could not.  I tried hitting the submit button multiple times with different configurations of filling out the form and was always restricted by the required fields.  

Only after fully filling out the form was I able to submit the form.  There will not be a submission that shows up if there is an incomplete payment and you can check for that while viewing submissions.

If that portion is red with a number, that means the submissions was incomplete due to an incomplete payment.  The user may have filled out the form and then gone back later and sent payment.  This is the only scenario I can think of to allow for this.  If you continue to have this problem, please let us know and we will look into it right away.

Thank you for using Jotform!

Thank you. I believe I need to "enable ipn for paypal", though my clients account doesnt show that option:

http://www.jotform.com/help/276-How-to-Enable-IPN-for-Paypal

IPN is available for Business type accounts. Ask your client to upgrade his/her account, it's free. 

Thanks

We upgraded and the option became visible, thank you all for your help!

Hello redrhino33,

On behalf of my colleagues, you are welcome.

Do get back to us if you have any questions.

Thank you!