Hi! They will communicate through email and online account (GCKey). They send an email with AOR which contains your application number and client number, you’ll need them both for all your application process and, also, to link your application to your account online. *If you don’t have an online account, you need to create your online account and you can do it without AOR. Remember to write down somewhere your password, security questions and answers.
I could link my application before they sent AOR. You can try if it makes you feel more relaxed.