You can add other email addresses to receive notifications using the Wizevents back end system.
How to get there:
Login to your Wizevents account
Click on the "Events" button.
Click on the first action item, "Edit" (pencil icon) next to the event you would like to make changes to.
What to do:
Under Step 1, "General Event Information", click on the button on the bottom, "Edit General Event Information".
Add any additional emails to the line beginning with "Additional Notification Emails".
Click "Save Event Changes" to maintain your changes.