You log it in just like a travel bug
go to the travel bug section on geocaching.com
There is already a thread going on stolen and missing geocoins
Go here
http://forums.Groundspeak.com/GC/index.php?showtopic=145368
thank you so much for all your help but I know how to track a TB I have a geo-coin ya know the round metal thing. I have tried to log it in in the TB log site but it tells me that they number is not activated...I want some one to know that I have their geo-coin but I need help.