I think the whole point here is that Opes model was not a margin loan between the Opes client and the bank (or Opes) like you probably have through Westpac. People dealing with Opes had assigned their title to Opes and in the event of insolvency by Opes that title went to the bank who had security over the shares.
Which means the receivers acting for the banks can sell the shares if action isn't taken to stop them until any legal disputes over the structure and agreements are resolved. Therefore people need to move before all the shares are sold and it is too late to recover them.
