How to limit users to one submission

4) Est-ce que la solution limite le répondant à une seule réponse? (Pour éviter qu’il actualise la page et puisse répondre plusieurs fois au sondage) 

Hi Samuel,

Thanks for reaching out to Jotform Support. Unfortunately, our French Support agents are busy helping other Jotform users at the moment. I'll try to help you in English using Google Translate, but you can reply in whichever language you feel comfortable using. Or, if you'd rather have support in French, let us know and we can have them do that. But, keep in mind that you'd have to wait until they're available again.

Now, coming back to your question, you can enable Unique Submission or Unique Field check to limit users to one submission. Let me show you how you can enable it:

• Open your form in Form Builder, and in the orange navigation bar at the top of the screen, click on Settings.
• In the menu that opens on the left side of the page, click on Form Settings.
• Click on Show More Options, scroll down and enable Unique Submission check.

Let us know if you have any other questions.