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.
Here's how you can embed the form to your Facebook Page:
But if you are using a third party to create the eCommerce system in your Facebook Page, you have to embed the form in that system. The form should automatically appear in the page when you save your eCommerce page.