We would not, you are correct. However, it might help to narrow down the pool of suspects, provided that the token in question didn't belong to Tiamat herself. From the sounds of things, I do not believe anyone here has received more than one.

[ so if it was left behind for some reason... ]

It is nothing certain, to be clear. Still, anyone who claims to not have received one, or refuses to explain their own ... They might be worth a little extra scrutiny.