My brain begins to melt with I get into the weeds with this thing. The facts as I know them: My father was born in Montreal around 1913. His family moved to the states when my dad was three, so my dad became a naturalized US citizen. I have no Canadian citizenship... that I know of, so I plan to apply to see but don't want to fall into a rabbit hole needlessly. He died here in 1991. I was born in 1952. No one applied for citizenship for me at any time during my life. I found a lot of docs when filing for veteran's benefits for my elderly mom. So I have a head start. Can anyone tell me if I should just go ahead and apply?
I am in a similar situation, except that my father was born in Ontario in 1915 and was naturalized a US citizen with his family when he was 19. As far as I can tell, you and I are both eligible. I applied for my citizenship certificate two months ago. One potential eligibility difference between you and me: I was born in 1944 and you were born in 1952. There are different provisions in the law for people born before or after January 1, 1947, but I believe both are eligible.
When you apply, be certain to send certified true copies. of your documents. This can be done by Canadian notaries and by some Canadian officials. I had it done at the Canadian consulate in San Francisco. If you have it done at a consulate, pay your fees online first and take your receipt with you. You won't have to pay for the copies if they are for a citizenship certificate.
Good luck!