You can access information about the attendees for a registration from your ecommerce control panel. To begin, hover over sell online and click on registrations and select a registration.
Once in the specific registration, click the attendees tab. Here you will see a list of attendees. You can click on a name to view more details. Or you can drag a name to the delete button to remove it. You can even export the attendee report as a CSV file.
When you click on a customers name you can see order details, and a link to their order receipt.