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Application number starts with any letter matter?

What is an application number?​

An application number is different from a unique client identifier (UCI) or client ID.

If you have multiple applications with us, they’ll have

  • the same UCI or client ID
  • different application numbers
An application number is specific to your application. We send it to you when we start processing your application.

To find it

  • look at the top corner of the letters you receive from us, such as
    • the acknowledgement of receipt letter (we send this after you submit an application)
    • an invitation to a citizenship test or ceremony (a letter or an email)
    • other letters
  • sign in to your account if you applied online (under View the applications you submitted or Account messages section)
Application numbers usually have 1 letter and 9 numbers. For example:

  • Citizenship: C123456789
  • Work permit: W993830598
  • Economic class: E099977028
 
Type: Online Application
Location: Toronto
Physical Presence Days: 1110
Application Type: 1 Adult
Application Sent: 19 July 2025
AOR: Sept 10 2025

Just received my AOR today. Does anyone know if i will have issues creating an account to track the application if I had an account on the same system for my wife's sponsorship application?