What is the application file number and when does it change?
Short answer: An IRCC-internal tracking number assigned to each submitted application, distinct from both the UCI and the Document Number. File-number prefixes follow patterns by stream (e.g., E + digits for economic class), and a new file number is assigned with every new submission.
The application file number is assigned every time you submit a new application to IRCC, and it changes with each new submission. It is used internally by IRCC to track that specific application's progress. Unlike your UCI (which is permanent), file numbers are application-specific. File-number prefixes follow these patterns:
- Economic class applications:
E + digits (example: E099977028)
- Work permit applications:
W + digits
- Study permit applications:
S + digits
- Visitor record applications:
V + digits
- Temporary resident permit applications:
T + digits
These prefixes are application file numbers, not permit document numbers. A single applicant can have multiple file numbers active at once across different applications. Once the application closes, the file number is archived but the UCI remains.
How do I find my work permit document number online?
Short answer: Sign in to your IRCC online account with GCKey or a sign-in partner, open 'View my submitted applications or profiles', and select your active work permit. The Document Number, UCI, and issue/expiry dates are listed on the document's detail page.
Sign in to your IRCC online account using your GCKey or sign-in partner credentials, then open the "View my submitted applications or profiles" section. Your active work permit document will show the Document Number, UCI, and issue/expiry dates on its detail page. The same data appears on every IRCC letter or email referencing your work permit.
Other places it appears:
- Physical and digital permit: top-right corner box.
- IRCC online account profile under "My Documents."
- IRCC correspondence: any decision letter, approval notice, or instruction email.
- Employer records: HR departments often store a copy under your I-9 equivalent file.
What if I can't find my Canadian work permit number?
Short answer: Contact the IRCC Client Support Centre and verify your identity with full name, date of birth, and country of birth. A licensed RCIC or lawyer with your written authorization can also retrieve it. Lost paper permits can be reissued with Form IMM 5444.
If you cannot locate your Document Number, the fastest path is to contact the IRCC Client Support Centre. They can confirm the number after verifying your identity with your full name, date of birth, and country of birth. A licensed Regulated Canadian Immigration Consultant (RCIC) or lawyer can also retrieve it on your behalf with signed authorization. Submitting an Access to Information and Privacy (ATIP) request returns a copy of your entire IRCC file, including all permit numbers ever issued, usually within 30 days for personal information requests.
Book a consultation with our licensed RCICs at Go Far Global if you're having trouble accessing your documentation or need clarification on your immigration file.
How does the document number affect your legal status in Canada?
Short answer: The Document Number is the primary identifier IRCC, employers, and CBSA officers use to confirm your authorization to work. Employers can verify your authorization through IRCC's employer-verification channel using this number, and the conditions printed on that specific permit govern your legal status.
The Document Number is the primary identifier IRCC, employers, and Canada Border Services Agency officers use to confirm you are authorized to work. When your permit is about to expire, IRCC's renewal notifications reference this number. Employers may be asked to verify your authorization independently using the Document Number, and they can confirm it through IRCC's employer-verification channels.
If your work permit is approaching expiry, file a renewal or apply for a Bridging Open Work Permit (BOWP) at least 30 days before expiry to maintain legal status. Falling out of status by even one day creates a refusal trigger that flows through every future application. Check current IRCC processing times before relying on a renewal landing on time.
Why does IRCC need your document number for PR applications?
Short answer: IRCC uses the Document Number to verify Canadian work experience claims on permanent residence (PR) applications, especially the Canadian Experience Class and Provincial Nominee Program streams. An officer cross-checks the number against your permit history, so it must match your records exactly. Missing or incorrect Document Numbers are a common cause of incomplete-application returns.
IRCC uses your work permit Document Number to verify Canadian work experience on permanent residence applications, especially through programs like Canadian Experience Class (CEC) and Provincial Nominee Program (PNP). When you claim Canadian work experience on your Express Entry profile, IRCC cross-references your Document Number against the issued permit, the National Occupational Classification (NOC) code on the permit, and the hours you have logged. A mismatched or stale Document Number flags the application for procedural review and delays processing by months.
When completing IRCC forms, double-check that you're entering the correct identifier. If the form asks for "document number," enter the U-series number (one letter, nine digits, top-right corner of your permit). If it asks for "work permit number," enter the W-series number. If it asks for "UCI" or "unique identifier," enter the 8-digit number.
Use our CRS calculator to see how your Canadian work experience affects your Comprehensive Ranking System (CRS) score.
