The case for those that sold illegally registered shares of RCCH is much more caveat vendor, seller beware.
If one follows securities law and commercial law then there is relief for those that were sold what others could not and should not sell/supply/deliver/fence.
Trades settled with bogus shares, but some entities have insurance in case they "find out" that they should not have sold what they did sell. We are past apologies here, there are commercial consequences to this.