Adressed by approved ground personnel who inserted the pin in first place! As per CSA Ground Operations Manual that should be followed in accordance with company policy and out-stations contracts.
I believe this will show to be a communications break-down in broader sense. Even with lot of finger pointing, no victims. Which is good. Did you know, that Airbus FCOM 1 (the pilot's system book) does not mention/depict the pins at all?
My thoughts are with the pilot reading the check-list, response is "removed" by looking at pin stowage box and seeing it full. The check-list logic is based on all pins out/all pins in logic. Logic that is flawed if only one pin us used.
FD.