Amanda10 said:
Yes I already submitted my passport. I am the sponsor. Three days again my husband address changed to my Canadian one.
congrats - it means that you're done! CIC acknowledges that your husband will live in Canada - so that's great news!
About UCI and File number etc...
UCI is a "number for life". So now, you have one because you have sponsored your husband. Your husband has one (it gets assigned at the second stage), and he can use it for all his dealings with CIC. It will be on his PR card, and it won't change normally.
The file number starts with an F + 8 digits : that's the file for this application. So once the application is done and the PR issued, the file will be closed, and the number won't be used anymore.
If you ( or your husband) apply for citizenship later on, the UCI won't change. But the file number will - you will get a new one corresponding to your application for citizenship etc.
Hope it clarifies!
Sweden