Form field is appearing blank in the Notification emails

I feel like it takes several emails for you to understand what I;m actually telling you, clearly. I told you I used the unique id and it wasn't working. I know where to find it, the issue is, it is NOT WORKING! I am putting that into the notification email as a field and when I recieve the email, it is BLANK!

Would you mind letting us know the Form in question and to which field are you referring so that we would be able to test your Form?

Thanks in advance.