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.
Can you please check and ensure that the "Auto-Return" is enabled in your PayPal account? Here are the steps:
1.Log in to your Paypal Account
2.Select "Edit Profile"
3.Under "Selling Preferences"
4.Select "Website Payment Preferences"
5.Note first option - Select "On" - Auto Return for Website Payments
6.Enter the Return URL where you want your user to be redirected after successful payment.
Also You must set your form's thank you page to that URL.
Hope this will help. Let us know if you need further assistance.