Going to bump this as I have a similar issue at the moment (albeit not related to a server transfer).

As far as I was aware, it was not possible to simply discard the eternity ring, but it seems like I cannot annul my Bond unless I have it, which I do not.
I've checked my retainer inventories, I've checked my stored and sent private mails, I've checked my inventory, I've checked my armoire, and it's not available for resale from a Calamity Salvager.
Where could it be? And how can I get it back to annul my current Bond? I tried to submit a bug report, but this is apparently not a bug so I'm a bit lost as to how to find it.