回複：回複：回複：回複：回複：加拿大返簽美國預約求助(nvars)

yes, I got the reference number after I successfully made the appointment. The reference number is very important for you, it is the identification number for not only your current application, but also further applications. I am just wondering how you could log into the website without this number? If you do not have, call the service centre as soon as possible.