Unique ID In Notification

I need a Unique ID in the notifications for one of my forms. I know Gravity Wiz does this - but my client does not want to pay extra money on top of what they’re paying for Gravity Forms. Any ideas?

Well, if the client doesn’t want to pay for a ready to use solution, your alternative is to create your own custom code solution.

The following filter allows you to provide the value for a field before saving it to the database: gform_save_field_value - Gravity Forms Documentation

How to generate the unique ID value, it’s up to your code.