Is there a way to show Custom Unique ID to the customer?

Is there a way to show this number to he customer on screen at time of submitting ?

The Unique ID will be generated when the form is submitted. You can only show the number on the Thank You page or send it to your users via an Autoresponder email.  

To add the Unique ID to the Thank You page, you will have to customize it and add the value of the Unique ID. 

Setting up the Thank You Page

Here is my demo form: https://form.jotform.com/80152068651958 

Feel free to test it. 

Hope this meet what you are looking for. 

Perfect . This is exactly what I needed . Thank you so much ! Worked flawlessly .