This should tell you that this info is not easy enough to find. Confirmation e-mails should be sent when order is received and order is shipped. Be ready for returns. This is where things get hard. It's easy to create a Web site and take orders.
Happy customers come back.
People who have purchased on the Internet will be loyal customers if they get the service they expect. If they are satisfied, they will come back without searching for a better deal. If you are small, don't overspend on the site. The client said the site paid for itself within the first two months. Save your money for good backend processes and for marketing expenses.