1

Why should you worry ?

2

if you r sending a photocopy of your passport to the canada embassy , why would you worry

good luck, on the visa , it is very difficult to get a tourist visa for a vietnamese person

3

You don't have to send it, but then she won't get a visa. Why would you worry about sending a passport copy to an entity that issues that same passport to you?

4

Sending a passport photocopy, is the least of your worries in this process
you will have many other doubts along the way

usually a vietnamese person is not given a tourist visa unless they have a business here, or a very good job with a big company
having loads of money in the bank, or real estate is not a guarantee that they will want to get back here
there is no posting of bond to ensure they will come back here, the embassy reply to that question was that the only time one can post a bond with canada is to get out of jail

with my ex wife, even being married and owning 14 000 m2 of beachfront land in vietnam was not enough to get a tourist visa ... it took us 17 months and ended up with a minister permit, and what a trip that was,

5

Thanks Junglebeach!