I wouldn't recommend you to write UCI number or File number outside envelop because it will be disclosed to external persons too. Write a cover letter with your UCI number, file number, full name, date of birth and place of birth on the top of the letter and place this cover letter on the top of your documents. You can write your NOC category, NOC code and FSW class outside the envelop.
LHEYYZ said:Thanks awai ali...uci as well as file #....right?