Well Keith, of course that's what we are worried about.
A great many of us sold significant portions of our gun collections in the dying days of the registry, filing the paperwork that confirmed those sales. Of course, when we bought replacements, those guns were no longer required to be registered so whatever documentation the government has is significantly out of date. In my case, I sold all my guns. Every last one. Then in the last month of the registry, the addiction came back and I bought one shotgun.
However, we are still required to be licensed and that will always give the government a pretty good idea of who has guns.
And as pleased as we are about reversing the trend towards gun control, I don't think Canada is a first in this regard. I believe New Zealand has a leg up on us in this regard.