Callie155

I live in Mo. and have found several (what looks like copied) $100 bills with the Groundspeak emblem on them. I don't know what they mean or what to do with them. I'm wondering if it's a takeoff the the where's george? Also, can I post them on where'sgeorge.com or are they just to travel around the in caches? Please let me know something.........thanks