A few years ago I got thoroughly fed up with trying to track down the owners of no-name papers. Now I put a folder on the wall labeled 'NO NAMES'. When grade sheets are passed around (printed by confidential student number), students who have assignments missing from the sheet go up to the folder to see if they had forgotten to include their name. I hung the folder on the wall with one of those clear plastic holders that doctors' offices use. My students always know where to look before coming to me about missing grades.