The Hunter-Ed Course is valid for only 90 days from the time of registration and payment. If you are not able to complete this course within 90 days, the course will be automatically renewed for another 30 days. Your credit card will be charged $10 for each renewal.
You can turn off the auto-extension feature at any time. Just uncheck the box beside "Automatically renew my course" available on your Profile page or Payment page.