I need to have a payment confirmation. How can I get this?

My understanding is that you want to send a confirmation email when someone completed your form.

If yes, then you need to create an Autoresponder Email alert. The Autoresponder is the email that your users will received upon completing the form. Here's a guide: https://www.jotform.com/help/26-Setting-Up-an-Autoresponder-Email.

If you want to receive an email copy of the submission, then you need to set an Email Notification alert. Here's a guide: https://www.jotform.com/help/25-Setting-Up-Email-Notifications.

Hope this helps. If not, please let us know so that we can further assist you. Thank you.