Welcome to the FAQ website covering document topics in Canada.
I have my original wallet-sized citizenship card. It has start d to come apart. The plastic on it is peeling at corners. Can I still use this for proof of citizenship. It is all eligible still thank you.
As long as it is legible you can still use it until you are told you should not use it any more (by a government of Canada employee). If you want to replace it with the new letter-sized certificate, you can do so.