The following tags can be used to add content dynamically:

• [from_name] - Attendee name
• [from_email] - Attendee Email
• [meta_data] - All custom form fields in list format
• [registration_id] - Registration ID
• [user_id] - User ID of attendee
• [event_id] - Event ID
• [event_title] - Event Title
• [event_dashboard_url] - URL to the frontend event dashboard page
• [event_url] - URL to the current event
• [organizer_name] - Name of the organizer which submitted the event listing
• [organizer_email] - Email of the organizer which submitted the event listing
• [date_of_participation] - Date of attendee checkin
• [event_post_meta] - Some meta data from the event. e.g. [event_post_meta key="_event_location"]
• [Address_1] - Custom field named "Address 1"
• [Address_2] - Custom field named "Address 2"
• [City] - Custom field named "City"
• [State] - Custom field named "State"
• [Zip_Code] - Custom field named "Zip Code"
• [Country] - Custom field named "Country"
• [Phone] - Custom field named "Phone"
• [Race_or_Ethnicity_of_Participant(s)] - Custom field named "Race or Ethnicity of Participant(s)"
• [Age_of_participants_(including_siblings)] - Custom field named "Age of participants (including siblings)"

All tags can be passed a prefix and a suffix which is only output when the value is set e.g. [event_title prefix="Event Title: " suffix="."]