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.
Unfortunately our current PayPal integration does not support the invoice option.
You can however set up your payments to be manually authorized.
Alternatively you can integrate you form to a third party invoicing software such as freshbooks, check out this guide on how to accomplish this
On behalf of my colleague Sammy, you are welcome.
Feel free to contact us if you have any other questions.