Question about custom single-use forms

Hi.

I'm using Jotform for one simple project, but I had another project come up today, and I was wondering if JotForm was the solution.

My client is selling a 'booklet/worksheet' that she wants to put online.  She wants to sell the booklet in "form" form, and have a one-time login so the purchaser can access the form, fill it out (at their leisure)... perhaps save it and come back to it, if possible... and when done, have a protected PDF printed out and mailed to them

So my question is this:

IS it possible to have a form, behind a paywall (whatever paywall we decided to have), so we can generate and send a one-time link to a JotForm (that can't be distributed), allowing the purchaser to fill out the form and when completed, receive the results in a protected PDF in their email?

It's a rather interesting use case.

This is all spec right now, and we don't have a website.

Hi there!

Thanks for contacting us. To achieve this, you have to create two forms.

A-) A Form with a payment widget where your clients can submit the payment.

B-) The second form that, when completed, will send a download link to the client or show a thank you page with the download link. 

The following guides will be of great help.- 

Mastering-Payment-Form-Integrations-with-JotForm

How-to-Automatically-Pass-Form-Data-to-Another-Form

How-to-Add-a-Downloadable-File-to-Your-Form

Do not hesitate to contact us at any time should you need further assistance. 

Ok. So is that second form link... a link that is single use? Or could it just be copied willy nilly to anyone who wanted it?
I.e. once purchased... would I just be able to send that link to all my friends?
...

The only way to make a single use form is to limit the number of submissions to 1. However, this means that only one user will be able to submit the form. After that, the form will be disabled. 

How to Limit Submissions in a Form