How to get unique number assiged to each submission?

I am looking for every person who submits a form to have a number assigned to them in the thank you email. An ordernumber after simply submitting the form :) How to do that?

You can add the Unique ID widget on your form, it will generate a unique ID once submitted, then you can add it within the email.

https://www.jotform.com/help/79-How-to-Add-Custom-Unique-IDs-to-your-Form-Submissions

https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email