The only dupe method I have discovered with my hours of attempting, is to drop gear on the floor, await 2 minutes for the gear to sink, the peer takes the gear, then the server admin restarts the server. This method can only work if you know the restart is about to occur, or you restart the server yourself by being an admin on server. If you need any other methods on help about dayz or this topic please contact me on skype: thomasalancoglanathotmail.com the at meaning the symbol used for all email addresses.
If you could leave me a thanks if this helped anyone, that would be greatly appreciated.
Best regards Tom.