It was very similar to what my colleague at CBA just described. We shared the list provided to us by the RCMP through a secure channel that only members of our organization were able to access. They then had a legal obligation under the emergency order to check against that list to see if indeed any of those individuals held accounts at their respective credit unions, in which case they were obligated to freeze those accounts.
On November 17th, 2022. See this statement in context.