Not quite sure what you mean by illiquid, but T Rowe Price brokerage very effectively ensured all my zecco shares were moved out. i had a few penny losers of major proportion there was no point in selling and hadn't yet bothered to take as a tax write off.
Although I provided both old and new zecco account number in form to TRP, Zecco claimed I had to refile with only one account number. TRP, once they figured this out, said they would take care of the matter and I did not personally have to resubmit any form.
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