Canada’s citizenship law changed on December 15, 2025. Effective that day, thousands — possibly millions — of people born outside Canada who have a Canadian ancestor became Canadian citizens.
Since then, many have come to us with questions about Canadian citizenship by descent. That makes sense, because we’re a Canadian genealogical research company. We help clients find information about their ancestors, and we use genealogical research methods and archival sources to prove family connections.
But if you’re considering our services because you’re applying for a certificate of Canadian citizenship, here are some important points.
Certified birth certificates
One thing is clear from the information provided online by Immigration, Citizenship and Refugees Canada (IRCC). They want to see “Birth certificate[s] showing parentage, issued by the responsible government authorities in the country where the person was born.” (See Documents establishing citizenship.)
Obtaining certified copies of birth records from government agencies is something you’ll need to do yourself, because the agencies might require a copy of your I.D., and they might need to know your relationship to the person named in the record.
Older birth records / no birth records
On the other hand, IRCC does not provide information about what documentation they require in historical cases such as:
- an ancestor born before their birth province started registering births (e.g., Ontario before 1869);
- an ancestor born during a time of official birth registration, but no registration exists (e.g., a significant percentage of Ontario births after 1869 were never registered);
- an ancestor whose provincial birth registration, due to its age, has been transferred from the government authority that issues birth certificates (e.g., ServiceOntario) to the provincial archives (e.g., the Archives of Ontario) who make images of birth records available online (e.g., through a partnership with Ancestry.com).
For cases like these, genealogists typically use the image copies of records on Ancestry.com and other family-history websites. We do this because, “in historical research, … [an image copy] is typically treated as an original, so long as no evidence suggests that the image may have been altered.” (Elizabeth Shown Mills, Evidence Explained, 3 rev. ed. (Baltimore, MD: Genealogical Publishing, 2017), 825.
This is an image copy of John McDonald’s 1855 Ontario baptism with a complete source citation:

This image would be an acceptable representation of the original document in a genealogical report. However, IRCC signalled in a recent stakeholder meeting (May, 2026) that they will not accept documents sourced from Ancestry.com — or, presumably, other any online resource. This guidance does not appear in IRCC’s public-facing information.
So when a genealogist provides you with images of archival documents from Ancestry.com or other online resources — standard practice in genealogy — you may need to obtain copies of the same records directly from the archives if you’re using them to apply for a certificate of Canadian citizenship.
According to IRCC, an applicant should be able to complete the process without assistance:
You can get all the forms and instructions you need to apply for a visa, a permit or citizenship for free on this website. If you follow the instructions, you should be able to fill out the forms and submit them yourself.
But given the conflict between genealogical practice and IRCC requirements, we recommend consulting a citizenship representative who specialises in Canadian citizenship by descent, because they may have received guidance directly from IRCC.
What a genealogist can do
Genealogists are experts at using archival records to prove questions of identity and kinship.
For example, when no birth record exists, we use the Genealogical Proof Standard (GPS) to prove the case. The GPS requires us to undertake reasonably exhaustive research, create complete source citations, test and analyse the evidence, resolve any conflicting information and provide the results in a coherently written format. (Board for Certification of Genealogist, Genealogical Standards, 2nd. rev. ed. (Nashville, TN: Ancestry, 2021).)
Consider this case: If your ancestor, John McDonald, was born in Clarence Creek, Ontario in 1855, he won’t have a birth certificate because Ontario didn’t start registering births until 1869. That doesn’t change the fact that the ancestor was born in Canada.
In a case like this, a genealogist can find and assess a variety of historical documentation to prove John McDonald was born in Canada. In addition to his 1855 Ontario baptism record, he may be listed with his parents in the 1861 census of Canada West. Those two documents, included in a written report, would provide genealogical proof that John was born in Canada.
This approach is consistent with IRCC’s guidance about Applications for citizenship certificates, which says:
The documents required to establish citizenship vary depending on the requirements of the provision of the Citizenship Act under which citizenship is being established.
All applicants must provide
- documents establishing citizenship outlined in the document checklist at the end of the Application for a Citizenship Certificate for Adults and Minors (Proof of Citizenship) Under Section 3 form;
- other documents, as required, for the assessment of the claim to Canadian citizenship and the possible loss of citizenship.
So if your ancestor was born in Canada before provincial birth registration, you may still be able to establish your Canadian citizenship. IRCC’s language is broad enough to allow for additional documentation (i.e., “other documents … for the assessment of the claim”), though it gives no specific guidance on documentation for ancestors with no official birth record.
Here’s what we can do
We can research your family history, identify the records that exist, locate the provincial or territorial agencies that hold them, and — where no birth or baptismal record survives — prepare a Canadian ancestry or birth evidence report that meets the Genealogical Proof Standard.
Here’s what we can’t do
We can’t tell you what documents IRCC will require or accept for your application.
We can’t obtain certified copies of birth records from provincial or state agencies.
Under the Citizenship Act, we can’t advise you — directly or indirectly, and for payment — in connection with your citizenship application. That role belongs to a lawyer, Quebec notary or licensed immigration consultant.
Our promise to you
What we can promise is that when you come to us, you’ll know exactly what the historical record says about your ancestor’s Canadian birth and your Canadian lineage. That’s the foundation any citizenship application needs — and it’s what we do best at dfh Research Services.
Clients can request copies of Quebec or Ontario birth certificates from these government authorities:
Directeur de l’Etat Civil. They issue Quebec birth certificates:
https://www.etatcivil.gouv.qc.ca/en/certificate-copy/certificate-copy.htmlBibliothèque et Archives nationales du Québec. They issue certified copies of archival parish registers that were authorised at the time as civil records: https://www.banq.qc.ca/notre-institution/banq/ordering-copies/
ServiceOntario. They issue Ontario birth certificates. https://services.ontario.ca/oca-web/main
Archives of Ontario. They issue certified copies of archival provincial registers. https://www.archives.gov.on.ca/order-reproductions/




