Replacement citizenship certificate

[livitup]

All,

My mother (now deceased) was a Canadian citizen (married to a US citizen) when I was born in the United States.  When I was a teenager I applied for, and recieved, a citizenship certificate.  Now, 20 years later, I would like to apply for a Canadian passport, but I can not find my citizenship certificate.  Also, after I recieved my citizenship certificate, my mother became a naturalized US citizen.

Now for my questions:

1) Does the fact that my mother became a US citizen after I recieved my Canadian citizenship certificate change or invalidate my Canadian citizenship?  (I would guess no, but...)

2) When applying for a replacement citizenship certificate, do I really need to fill in the complete application, as if starting from scratch?  I am concerned, because many of the questions I can not answer, as both my parents are now deceased, and I just don't know the answers to most of the questions.  Any advice?

I may just contact the Canadian embassy in Washington, but I would prefer not to ask them any questions that may lead to problems. 

Thanks!

[Leon]

1. no

2. since you already had one, fill out what you can and include a cover letter saying you already had one but lost it, should do the trick.