Rings of Power talk!

[Radtech51]

Originally Posted by Inziladun

Good questions, with no certain answers!

Perhaps, with Sauron defeated, the Witch-king, knowing his master would eventually return (since nothing had changed for the WK or his fellow wraiths, regarding their enslavement), took the rings with him into temporary exile in the East.
Then, when Sauron began his re-embodiment in Dol Guldur, the rings were returned by the Nazgûl.

That's my guess, anyway.

That's what I had though as well, however what about this time when he could have easily of lost his own ring: During the time when king Ar-Pharazôn sailed to Middle-earth to combat Sauron, seeing the might of Númenor, Sauron agreed to be the king's captive, and he was brought back to Númenor. What happened to the one ring then? Why didn't king Ar-Pharazôn take the ring from him then when he was captured?