Where to mail your citizenship certificate (proof of citizenship) application
Mail your citizenship certificate application (form CIT 0001) to the Case Processing Centre – Sydney – Proofs, P.O. Box 10000, Sydney NS B1P 7C1. Sending by courier? Couriers cannot deliver to a PO box — use the IRCC Digitization Centre – Proofs, 3050 Wilson Ave, New Waterford NS B1H 5V8. The courier hub recently moved from Dorchester Street in Sydney, so older addresses no longer work.
Proof of citizenship (CIT 0001) — regular mail
Case Processing Centre – Sydney – Proofs P.O. Box 10000 Sydney NS B1P 7C1
Applications for a citizenship certificate (proof of Canadian citizenship) sent by Canada Post, including tracked Xpresspost letters
Proof of citizenship (CIT 0001) — courier
IRCC Digitization Centre – Proofs 3050 Wilson Ave New Waterford NS B1H 5V8
Applications sent by private courier (FedEx, UPS, Purolator, etc.) — couriers cannot deliver to the Sydney PO box
Mail it without printing anything
Upload your document — we print it, seal it, and deposit it with Canada Post within 24 hours on business days. $6 flat, no account needed, and you get a Confirmation of Mailing email for your records.
Key facts
- IRCC’s courier intake recently moved: courier all proof applications to the IRCC Digitization Centre, 3050 Wilson Ave, New Waterford NS B1H 5V8. The old Dorchester Street, Sydney courier address is obsolete; regular mail still goes to the Sydney PO box.
- Watch the three-PO-box trap in Sydney: proofs go to PO Box 10000 (B1P 7C1), citizenship grants to PO Box 7000 (B1P 6V6), and PR cards to PO Box 10020 (B1P 7C1).
- Need it fast? Write "Urgent – Citizenship Certificate (Proof)" in large dark letters on the envelope and include documents proving the urgency (travel, job, or benefits deadline).
- IRCC now offers an electronic citizenship certificate (e-certificate) option, and prefers online applications where available.
- IRCC recommends tracked mail. PostPal prints and deposits your application with Canada Post the next business day — $6 flat, so newcomers without a printer can mail IRCC paperwork entirely online.
How to mail it, step by step
- 1
Complete form CIT 0001
Fill out the Application for a Citizenship Certificate (CIT 0001), sign it, and gather the photos, identity documents, and parent or birth records the document checklist asks for. Pay the fee online and include the receipt.
- 2
Flag urgent processing if you qualify
If you have a deadline — travel, a job, or access to benefits — write "Urgent – Citizenship Certificate (Proof)" in large dark letters on the envelope and include proof of the urgency, such as an itinerary or employer letter.
- 3
Match the address to your carrier
Canada Post mail goes to Case Processing Centre – Sydney – Proofs, P.O. Box 10000, Sydney NS B1P 7C1. Private couriers go to IRCC Digitization Centre – Proofs, 3050 Wilson Ave, New Waterford NS B1H 5V8. The courier address changed recently — don’t copy it from an old application.
- 4
Send it tracked
IRCC recommends tracked mail so you can confirm delivery. Upload your package to PostPal and we print, envelope, and deposit it with Canada Post the next business day — $6 flat, with a dated mailing confirmation.
Common questions
Where do I mail my citizenship certificate application (CIT 0001)?
By Canada Post, mail it to the Case Processing Centre – Sydney – Proofs, P.O. Box 10000, Sydney NS B1P 7C1. By private courier, send it to the IRCC Digitization Centre – Proofs, 3050 Wilson Ave, New Waterford NS B1H 5V8 — couriers cannot deliver to a PO box.
How do I request urgent processing of a proof of citizenship?
Write "Urgent – Citizenship Certificate (Proof)" in large dark letters on the outside of your envelope and include documents that prove the urgency — for example a flight itinerary, a job offer that requires proof of citizenship, or a benefits deadline. Without supporting proof, IRCC processes the application in the normal queue.
Has the courier address for proof applications changed?
Yes. Courier packages now go to the IRCC Digitization Centre at 3050 Wilson Ave, New Waterford NS B1H 5V8 — the former Dorchester Street address in Sydney is obsolete. Regular Canada Post mail is unaffected and still goes to P.O. Box 10000 in Sydney.
Is PO Box 10000 the same box as PR cards or citizenship grants?
No. Sydney hosts three separate IRCC boxes: proofs of citizenship go to PO Box 10000 (B1P 7C1), citizenship grant applications to PO Box 7000 (B1P 6V6), and PR card applications to PO Box 10020 (B1P 7C1). PO Boxes 10000 and 10020 even share a postal code, so read the box number carefully.
Can I get an electronic citizenship certificate instead of a paper one?
Yes. IRCC now offers an e-certificate option for proof of citizenship, and it prefers online applications where available. If your situation still requires a paper application, PostPal can print and mail it for you — $6 flat, deposited with Canada Post the next business day.
Who needs a citizenship certificate?
Typically people who are Canadian citizens but were never issued proof — such as children born abroad to a Canadian parent — or citizens who need to replace a lost, stolen, or damaged certificate. It is the standard document for proving citizenship when you have no Canadian birth certificate.
Sources
Addresses verified June 2026 against official sources. Always confirm on the official site before time-sensitive filings.