JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
If you actually received a payment for 'incomplete payment submission', it usually means that we have not received an instant payment notification about successful payment from PayPal.
The reason behind this can be disabled Instant Payment Notifications (IPN) within your PayPal account. Please make sure that IPN is enabled within your PayPal account settings.
If you need any further assistance, please let us know.