From the National Firearms Association (NFA) we learn that the RCMP is contacting owners of restricted firearms which are being reclassified as prohibited.
3. Commencing mid-July 2020, the RCMP has been sending out notifications to firearm owners, whose firearms were previously classified as restricted firearms and who are affected by the change of classification. These notices are unusual: they purport to be notifications of the change of classification and of the resulting cancellation of the registration certificate. These notices do not use the word “revocation” but rather refer to a “cancellation” or “annulment”. Further, these notices do not contain the mandatory notification to the affected party of the right to file a reference under s. 74 of the Firearms Act, to challenge the decision.
If you have received such a notification, you should read the whole NFA Media Release to find out what actions you might be able to take. “Remember that incompetent advocacy may do more harm than good, since your case may set a precedent that will influence decisions in other cases.”
You might earlier have received a letter informing you that your non-restricted firearms may have been reclassified as prohibited. The Canadian Shooting Sports Association advises
If you own any firearms the government reclassified from Non-Restricted to Prohibited on May 1st, you are covered by the blanket amnesty they imposed under SOR/2020-97.[iv]
Do NOT call the RCMP to ask if your guns are now Prohibited. The only way the RCMP will know you own any newly-Prohibited firearms is if you tell them.
Do NOT surrender your firearms to the RCMP or any other police force until the Liberal government passes legislation to fund their buy-back scheme.
Again, read the whole thing. If in doubt, seek competent legal advice.