Hi cirene. Based kn my ecas, yes. In the aor, he has a uci and file number. When i access his ecas i use his uci and his family name and bday then goes to his ecas where there is a link in me as applicant but i will not see further details about me like address. Then, if i want to access my own, i use file number or application number which starts with F000... And put my name then i see my own ecas where i can see all my details and where i requested for a change in mailing. However, i have not received my own uci number ( i dont know if im supposed to have that and when i should have that, do you have your own uci, i never worked nor studied before in canada so i didnt have uci yet). I hope that works for you too. Yes, my hubby is also canadian citizen by birth so uts his first time to have uci as well.