Thank you soooooooo much!!
I have one more question:
One of my friend submitted her application for post-graduation work permit on line on around 11 August. Today she just noticed that she forgot to attach a very important letter on her application. This letter is from her educational institution and may very likely influence the duration of the work permit she gets.
The question is: how can she notify CIC of the situation, and where can she send the letter to?
Thanks again for your time and kindly help!!