How to get a confirmation reading the form by the user before sending it?

I believe that you want to place some text to display on the form like Terms and conditions. Is that correct? If so, you may consider using one of the following widgets on the form.

https://widgets.jotform.com/widget/short_scrollable_terms

https://widgets.jotform.com/widget/terms__conditions

Please refer to the guide below that can help you with adding terms and conditions to the form.

https://www.jotform.com/help/154-Creating-a-Scrollable-Terms-and-Conditions

Hope this information helps! Let us know if you are referring something different. We will be happy to assist you further.