That's a very good idea, and we have informally adopted that already. What I have my lawyers do is keep a listing of each person they've sworn the statutory declaration for and how they were able to confirm that this person is who they say they are. So they would keep track of what ID they did see from the person, or they would write down who it was that vouched for this person. Then I collect them at the end of the election and I have those available in case someone makes a complaint to the Law Society or in case Elections Canada has questions.
So what you're suggesting is a more formalized process of what we're already doing.