I created this homebrew magic item for my local gaming convention (called Coulee Con), and handed it out to those that were doing D&D/Pathfinder stuff. I made a couple of tweaks, and now it's available for anyone here.

Yes, it's a magical convention badge for your PCs. It requires attunement because you need to be wearing your badge at all times in many conventions.

If you print it out at 4x3 inches, it should fit into a convention badge holder.