Commissioners are able to view all of the player details for each box from within their Contest Settings pages, specifically on the Players page.
At the bottom of the Settings > Players page, you'll find a detailed table that shows every single sold box, along with the Player's name and username, with a button to view their email address.
Using this page, you'll be able to track down who that person was that forgot to include their name in the box, or didn't provide their real name when registering.
You'll also be able to make changes to the boxes, including changes to the box text, as well as being able to delete a player from a box entirely.