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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

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