You already understand the importance and prestige of custom passes for your big event. Your attendees look more official and professional, and carry free advertising for your event around their necks. Event passes are also also often a popular keepsake for attendees.
But the primary function of the pass is physical security. It helps identify attendees, and eliminates any confusion about who does and does not belong. Here are a few additional tips on ways to use your event passes to secure access to your event.