In the Prepaid Package menu, you can Check-in and Check-out visiting customers. When checking out, we can customize the note label so that it can be customized to the desired/needed Header note. For details on the configuration, you can check the explanation below:
Step 1. Go to Setup Menu - More Menu - AddOns

Step 2. Tab Prepaid Package - Note Labeling (Note Label & Note2 Label) - Save
For example, here we will change the note label and note2 label to 'Notes 1' and 'Notes 2'.

Step 3. Check The Label Changes
You can check the existing configuration before you want to check out the customer on the prepaid package menu.

You might also like to read this article :
You can add a Trainer/Therapist to record incentives through this article : Adding New Trainer Or Therapists
Do you need to calculate incentives for Trainers/Therapists? you can setup through the following article : Incentive For Trainer
For customers who want to extend their prepaid package membership by repurchase, you can setup the config with this article : Extending Package Expiry Date Options.