CIT 0001 form — how to fill the proof of Canadian citizenship app

The proof of Canadian citizenship application uses one form, CIT 0001. Eight pages, six sections, no obvious tricks. About 22% of applications get returned to the applicant for corrections — half of those for fixable form errors that the canada.ca instructions don't make obvious.

This walkthrough covers every field, where the common mistakes happen, and what the IRCC adjudicator looks for. For the eligibility rules behind why you're applying, see Canada citizenship by descent 2026 — who qualifies under the new law. For the US-side context, see Citizenship by descent for Americans 2026 — country-specific guide.

What CIT 0001 actually is

A single PDF form serving multiple purposes:

• Proof of citizenship for adults (the descent-rule use case)
• Proof of citizenship for minors (children whose Canadian parent never registered them)
• Replacement certificate for someone who already has citizenship but lost their card or paper certificate
• Search of citizenship records (less common; mostly used by genealogists)

For a descent application under the December 2025 reform, you'll be filling it out as an "adult applicant requesting first-time proof of citizenship."

The form is bilingual — every field appears in both English and French — but only one language version needs to be completed. Pick whichever you're most comfortable in. IRCC processes both equally.

Before you start: what you need on hand

1. Your own birth certificate (US state-issued or other country)
2. Documents tracing the chain to your Canadian-citizen ancestor (every intermediate generation's birth, marriage, death records)
3. Two passport-sized photos taken within the last 6 months, meeting the IRCC photo specifications
4. A guarantor who has known you for at least 2 years
5. $75 CAD payment (Visa, Mastercard, American Express through the online payment portal)
6. A printer (the application must be submitted on paper unless you use the IRCC online portal — but for descent claims, paper is the recommended path)

Read the form once through before filling anything in. The order of operations matters; some early sections reference later sections.

Section A: Personal information about you

Fields 1–22.

The most-rejected fields in this section:

• Field 3: Surname (Last name). Use exactly the spelling on your most recent government-issued ID. If your passport says "Smith-Jones" and your birth certificate says "Smith Jones" (with a space), use the passport version and explain in the optional clarification at the end. Hyphens, accents, and spelling variants all matter — IRCC matches by exact characters.
• Field 4: Given names. All given names from your birth certificate, in order. If you go by a middle name, you don't list that as your "given name" — only what the birth certificate shows.
• Field 8: Other names you've used. Include every name. Maiden name if you've changed it. Anglicised forms ("Pierre" → "Peter" if both appear in your records). The system flags discrepancies between supporting documents; pre-emptively listing alternate names prevents adjudicator follow-up questions.
• Field 15: Country of birth. Country where you were physically born. Not your parents' country, not your country of citizenship — your physical birthplace.
• Field 18: Citizenship. Your current citizenships. If you have multiple, list all. The form has space for two; if you have three, add a note in the clarification box at the end.

The rest of Section A is straightforward: address, phone, email, date of birth. Use the address where you'll receive mail for the next 12 months — IRCC sends the citizenship certificate to this address, and a change of address mid-process slows things down by 4–8 weeks.

Section B: How you became a Canadian citizen

This is the heart of the form for descent applications.

Field 23: Are you applying for proof of citizenship for the first time? For most descent applicants under the reform: Yes.

Field 24: How did you acquire Canadian citizenship? The descent option is B2 — "I was born outside Canada to a Canadian parent or grandparent." Select it.

Fields 25–30 ask about the Canadian parent or ancestor through whom you're claiming citizenship. Note carefully: the form is set up for parent-or-grandparent (single generation). For deeper descent claims (great-grandparent, great-great-grandparent), there's a space at the end of the section to provide the longer chain.

For the immediate-ancestor fields:

• Full name of the Canadian ancestor (use the name as it appears on Canadian records)
• Date of birth
• Place of birth (the Canadian city/province if known; the parish if Quebec records)
• Date of death if applicable
• Their citizenship status when you (or the next-generation descendant) was born

The trick: the form asks for the Canadian ancestor in your line. For a four-generation chain (you → parent → grandparent → great-grandparent → great-great-grandparent who was the Canadian-born ancestor), the form's main fields cover your great-great-grandparent. The intermediate generations go in supporting documents.

Field 31: Additional Canadian ancestors in your lineage. This is where the multi-generation chain gets summarised. Format expected: one line per intermediate generation, with name, birth date/place, and relationship to you.

Section C: Documents you're providing

Fields 32–48.

This is a checklist of supporting documents. For each, you check a box indicating you've included it, and note the document type.

For a typical four-generation descent claim, the list includes:

• Your birth certificate (certified copy)
• Your parent's birth certificate (certified copy)
• Your grandparent's birth certificate (certified copy)
• Your great-grandparent's birth certificate (certified copy)
• Your great-great-grandparent's Canadian birth certificate (certified copy, Quebec parish extract, BAnQ certified copy, etc.)
• Marriage records for each generation if applicable (showing the name continuity through generations where surnames changed)
• Death records for any intermediate ancestor who died before the next-generation descendant was born (rare but sometimes required to establish the lineage continuity)

Each item gets its own row. If a document is unavailable, check the "alternative evidence" box and explain in Section E.

Section D: Prior citizenship claims

Fields 49–53.

If you've never previously applied for Canadian citizenship or proof of citizenship, the entire section is "No / N/A".

If you have applied before:

• IRCC file reference number (from the previous correspondence)
• Date of previous application
• Outcome (granted/rejected/withdrawn)
• Reason for current re-application

The most common reasons for re-application after a prior rejection: a parent's records were unavailable previously and now exist; the law changed (December 2025 reform is the obvious example); previous application was rejected for incomplete documentation that's now complete.

Section E: Additional information

A free-text section where you can explain anything that requires context. Use it.

Specifically, descent applicants under the December 2025 reform should add a brief note here that says: "I am applying under the December 15, 2025 amendment to the Citizenship Act, which removed the first-generation limit on citizenship by descent. My Canadian ancestor is [name] of [parish, province]. I am the Xth-generation descendant in the maternal/paternal line."

This pre-emptively tells the adjudicator how to read the chain. Without it, adjudicators sometimes apply pre-reform rules and reject claims that should be approved.

If you have any other anomalies — adopted ancestor, ancestor with a name change, ancestor with conflicting documents — explain them here. Volunteer information; don't try to gloss over the discrepancy. Adjudicators have seen everything, and a clean explanation prevents follow-up questions.

Section F: Guarantor declaration

Fields 54–68.

The guarantor signs here. They must:

• Have known you for at least 2 years
• Be from the approved-profession list (Canadian citizen, US-licensed attorney, notary public, medical doctor, dentist, postmaster, religious leader, bank manager)
• Sign one of your two photos on the back (with their name and the date)
• Provide their professional license number
• Sign and date the declaration

The guarantor doesn't need to be Canadian. Since the 2024 update, US-licensed professionals qualify. The instructional text on the form still emphasises Canadian guarantors because canada.ca hasn't fully updated the legacy copy, but the underlying policy allows US guarantors.

Section G: Applicant declaration

Field 69.

You sign and date the form. The signature must match the signature on the supporting documents (passport, ID). A typed signature is not acceptable; this must be a handwritten signature in ink.

Photos

Two photos, taken within the last 6 months, meeting the IRCC photo specifications:

• 50mm × 70mm (2 inches × 2.75 inches)
• Plain white or light-coloured background
• Direct front view, neutral expression
• Glasses must be off (since 2016)
• Hat or head covering only for religious reasons

One photo gets attached to the form. The other gets signed by your guarantor on the back, then included separately.

US-licensed passport photo studios produce photos meeting Canadian specs; some Walgreens, CVS, and FedEx Office locations specifically offer "Canadian passport photo" sizes. Cost: $10–$20 USD.

Payment

$75 CAD per adult, $75 CAD per child. Pay through the IRCC online payment portal. Get a receipt — printed PDF or a screenshot showing the transaction reference number — and include it in the application package.

Americans paying in USD: the exchange rate is set the moment the card is charged. Plus your card's foreign-transaction fee (1–3% above interbank). Expect the actual USD charge to be around $58–$62.

Mailing the application

The completed application goes to:

Case Processing Centre - Sydney Proof of Citizenship Section P.O. Box 10000 Sydney, NS B1P 7C1 Canada

Send by tracked mail (USPS Priority, FedEx, UPS) so you have proof of delivery. IRCC does not acknowledge receipt for 4–8 weeks; tracking is your only confirmation in that window.

What to include in the envelope:

1. The completed CIT 0001 form, all sections
2. Both photos (one attached to form, one signed by guarantor)
3. Payment receipt
4. All supporting documents, organised in chronological order from oldest to most recent
5. A cover letter (optional but recommended) summarising the lineage

Common rejection reasons

The 22% of applications IRCC returns to applicants typically fail on:

• Name spelling mismatches between the form and supporting documents
• Missing intermediate-generation records (claim of great-grandparent ancestry without documentation of grandparent or parent)
• Guarantor not meeting the profession criteria
• Photos that don't meet specifications (most often: glasses, hat, low contrast, wrong size)
• Payment receipt missing or unreadable
• Cover letter saying one thing, supporting documents saying another

The first one — name mismatch — is by far the most common. The fix is pre-emptive: list every name variant in Section A field 8, and explain in Section E.

After submission

You receive an acknowledgement of receipt within 4–8 weeks. The acknowledgement includes a file reference number to check status. Processing takes around 12 months at current volume (May 2026); see There's now a one-year wait for proof of Canadian citizenship.

If IRCC needs additional documents, they'll mail a request. You typically have 90 days to respond. Failure to respond within 90 days triggers an automatic rejection — you can re-apply but the queue restarts.

Once approved, IRCC mails your Canadian Citizenship Certificate (plastic card + paper certificate). With that in hand, you can apply for a Canadian passport, register to vote in Canada, and exercise all other rights of Canadian citizenship.

Source: CIT 0001 application form and instructions on canada.ca, and the IRCC operational manual ENF 4 for adjudication standards.