While customers can unsubscribe from the emails they receive, there might be times when you're asked to do this on the customer's behalf; there may also be times when the customer has forgotten they unsubscribed and want to resubscribe
Go to the People Page (depending what type of email, it could be the parent or student)
Next to the customer's email address is a Subscriptions button; click on it and update the email they do or do not wish to receive.
