This ticket stub is from the Redskins vs Philadelphia Eagles game payed on December 27, 2003. The Re-Entry passes were given to club level ticket holders if they exited the Club Level. A mark was placed on the back of the actual ticket by the Redskins staff at the Club Level entry. Once marked, that ticket would no longer get you in the Club Level. You had to have a re-entry pass with your ticket. They would then collect the re-entry pass when you came back in. So you wont see many of them since they were collected upon return.  I guess too many people were dropping their stubs down to friends who used them to access the Club Level.