Mine were removed from my Fidelity account as well. I just spoke with someone there, and they stated that they consider the bankruptcy closed and those cusip holders have no value so they were deleted. I attempted to ask them what specific document they receive to initiate that action and the rep was unable to answer that. She said she would pass it along to see if someone else could answer, so I may receive some additional information at some point, but I'm not holding my breath. I will update if I get an additional response from Fidelity.
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