There can be instances when you want to create a unique ID for your form entries. By providing each entry a unique number you can make it more traceable for any internal function or for the reference of the receiver.
This field type is basically a hidden field that works for unique ID purposes.
Adding the Unique ID in forms
Simply use the Field Type "Unique ID" to use this feature
Adding the Unique ID in Email
You can use Tokens or form ID shortcode
Example