Go to notification list > edit notification > Design tab

If you want to hide the name of users who will be shown in the notification, here is the option for you. 

This will help you maintain the privacy of the user if required.

  • In the Text editor section
  • remove {{F_NAME}} & {{L_NAME}} keyword and set your custom text: 
  • Sentences will look like: Anonymous from {{CITY}}, {{COUNTRY}}