Nevermind... I think I just got my question answered.

For DO, our badges don't have any differentiating information on them whatsoever. No mark, or initiation number, anything like that. Every badge is the same. That's why I didn't understand how you'd know who it belonged to... heck... for us, if you have two DOs living together, it's very likely that at some point your badges will get swapped. Very different than other groups, it sounds like!