Canadian Citizenship by Descent: ‘Lost Canadians’, Broken Rules, and the Law That Fixed Them

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By Audra De Falco, Latitude Director of Citizenship by Descent, who has worked in Citizenship by Descent since 2005, advising clients across European and Canadian programs. 

Canada has one of the most complex Citizenship by Descent histories of any country in the world. For decades, a patchwork of discriminatory, arbitrary, and often contradictory laws stripped citizenship from people who should have had it, denied it to people who deserved it, and created an entire class of individuals who came to be known as ‘Lost Canadians’.  

In December 2025, Bill C-3 finally rewrote the rules. If you have Canadian ancestry, the path to dual citizenship may now be open to you in ways that were unthinkable just a few years ago. 

Before There Was Canadian Citizenship

When Canada became a country at Confederation in 1867, there was no such thing as a Canadian citizen. Canadians were British subjects, part of the British Empire. The first Immigration Act in 1910 described who could be considered “Canadian” for immigration purposes, and the Naturalization Acts of 1906 and 1914 codified certain rules about nationality, but none of these created a true legal status of Canadian citizenship. 

The laws of this era reflected the attitudes of the time. Married women took on the nationality of their husbands. Children born in wedlock were considered the “property” of their fathers and assumed their fathers’ nationality. Children born outside of marriage belonged only to their mothers. These principles would haunt Canadian citizenship law for the better part of a century. 

The 1947 Act – Canada Creates Citizenship (and its First Problems)

On January 1st, 1947, the Canadian Citizenship Act came into force. For the first time, Canadian citizenship existed as a formal legal status. There were three ways to acquire it: by birth on Canadian soil, by naturalization (for immigrants), and by descent (for people born outside Canada to a Canadian parent). 

The 1947 Act was groundbreaking in some respects. While it recognized women as individuals and allowed them to determine their own citizenship independent of their husbands, it was far from perfect. It contained several provisions that would create enormous problems down the road. 

Naturalized citizens lost their citizenship if they left Canada for more than six consecutive years (later extended to ten). Canadians who took out citizenship in another country automatically lost their Canadian citizenship, because dual citizenship was not permitted. And children born abroad in the second or subsequent generation had to actively apply to retain their citizenship before their 28th birthday or lose it automatically. 

The Act also failed to address the situations of many people who should have been covered. Between two and three thousand Canadian women who had married Allied soldiers during the Second World War and lost their nationality under pre-1947 rules were not automatically repatriated. The roughly 100,000 Home Children, orphaned children brought to Canada from Britain in the early 20th century to be adopted or used as farm labor, were often never registered as citizens. Border babies, children of Canadian parents born in American hospitals near the border, fell through the cracks if their births were not registered. 

These were the seeds of the ‘Lost Canadians’ crisis. 

From 1947 to 1977, Many Canadians Lost Their Citizenship

Between 1947 and 1977, the citizenship rules operated as a quiet machine for stripping people of their status. The mechanisms were numerous and often invisible to the people they affected. 

If you were a Canadian who naturalized in another country, you automatically lost your Canadian citizenship even if you did not realize it. Between 1947 and February 15th, 1977, at least 240,000 Canadians became U.S. citizens, and every single one of them lost their Canadian status. If your father naturalized in another country while you were a child, you lost your citizenship too. If you were born abroad to a Canadian parent in the second or subsequent generation and did not apply to retain your citizenship before turning 28, it was gone. And because many people never even knew about the retention requirement, they lost citizenship without ever realizing it. 

Most of these so-called ‘Lost Canadians’ discovered their situation only when they tried to do something that required proof of citizenship such as applying for a passport, accessing healthcare, claiming a pension. The discovery was often devastating. 

The 1977 Act Made Some Fixes but Caused New Problems

The Citizenship Act of 1977 (which came into force on February 15th, 1977) was a significant overhaul. It introduced several important changes.  

• Canada began allowing dual citizenship for the first time.  
• Children could derive citizenship from their mothers, not just their fathers, regardless of marital status.  
• The retention requirement was eliminated for the first generation born abroad; those children were now automatically Canadian at birth. 

But the 1977 Act created its own problems. The second and subsequent generations born abroad were still subject to retention requirements, now needing to apply by age 28 to keep their citizenship. And critically, the Act was not fully retroactive. People who had already lost their citizenship under the old rules, including those born abroad who had missed the retention deadline and Canadians who had naturalized elsewhere before 1977, were not restored. Their loss stood. 

This is the era that produced the core group of ‘Lost Canadians’: people born abroad to Canadian parents who had been citizens their entire lives in every meaningful sense but who lost their legal status because of a technicality they often never knew existed. 

2009 and the First-Generation Limit

In 2009, amendments to the Citizenship Act imposed what became known as the first-generation limit. Under these new rules, Canadian Citizenship by Descent could only be passed to the first generation born outside Canada. If your parent was born in Canada or was naturalized there, you were Canadian. But if your parent was also born outside Canada, even if their parent (your grandparent) was born and raised in Montreal or Winnipeg or Halifax, citizenship could not pass to you. 

The 2009 amendments did remedy some Lost Canadian situations. Citizenship was granted retroactively to people who had been born or naturalized in Canada as well as to British subjects residing in Canada before 1947. The changes also extended citizenship to the first generation born abroad to these newly recognized citizens. By 2015, nearly 20,000 individuals had their citizenship status remedied through the 2009 and 2015 amendments combined. 

But the first-generation limit created a new class of excluded people. Second-generation Canadians born abroad, people whose grandparents were indisputably Canadian, were cut off. The law drew a hard line that bore no relation to a person’s actual connection to Canada. 

The Bjorkquist Decision – The Courts Step In

In December 2023, the Ontario Superior Court of Justice ruled in the Bjorkquist case that the first-generation limit was unconstitutional. The court found that the law produced unfair and unacceptable outcomes for children of Canadians born outside the country, violating the equality rights protected under Section 15 of the Canadian Charter of Rights and Freedoms. 

The federal government chose not to appeal. Instead, it introduced interim measures to support those affected by the ruling, and then set about drafting a comprehensive legislative fix. 

Bill C-3 Changed Everything

Bill C-3, An Act to Amend the Citizenship Act (2025), was introduced on June 5th, 2025, received Royal Assent on November 20th, 2025, and came into force on December 15th, 2025. It is the most sweeping reform of Canadian Citizenship by Descent in the country’s history. 

The law made three fundamental changes. 

1. For People Born Before December 15, 2025, The First-Generation Limit is Gone 

   If you were born before that date and have an unbroken chain of descent to a Canadian citizen, you may now be recognized as a Canadian citizen automatically, regardless of how many generations were born outside Canada. There is no generational cap. You do not need to prove physical presence in Canada. You do not need to take a test, attend a ceremony, or swear an oath. If you qualify, you are already a citizen. What you apply for is proof of citizenship (a citizenship certificate). 

2. For People Born on or After December 15th, 2025, Citizenship Can Still Pass Beyond the First Generation, But With a Substantial Connection Requirement 

   If a child is born abroad on or after that date to a Canadian parent who was also born abroad, the parent must demonstrate at least 1,095 days (three years) of cumulative physical presence in Canada before the child’s birth. This ensures that future Citizenship by Descent is tied to a meaningful connection to the country. 

3. The Law Restores Citizenship to the Remaining ‘Lost Canadians’ 

   Bill C-3 extends citizenship to those who lost it under the old Section 8 retention rules, to the descendants of previously remedied ‘Lost Canadians’ who were excluded by the first-generation limit, and to those born after 2009 but before December 15th, 2025, who would have been citizens but for the generational cutoff. These individuals no longer need discretionary grants or special ministerial approval. They are citizens by operation of law. 

The law also includes a simplified renunciation process for people who discover they are now Canadian citizens under Bill C-3 and do not wish to hold that citizenship (relevant for citizens of countries that do not recognize dual nationality). 

What This Means for Americans with Canadian Ancestry 

The implications for Americans are enormous. Millions of Americans have Canadian roots. Waves of Canadian emigration to the United States occurred throughout the 19th and 20th centuries: French Canadians who settled across New England, Maritimers who moved to the Boston area, families from across the provinces who relocated for work in Detroit, Buffalo, Seattle, and cities throughout the Midwest and Pacific Northwest. 

Both the United States and Canada fully recognize dual citizenship. Claiming Canadian citizenship does not require you to renounce your U.S. citizenship, and it does not by itself create Canadian tax obligations. Canada taxes based on residency, not citizenship. As long as you continue to live in the United States, your Canadian citizenship has no impact on your U.S. or Canadian tax status. (If you relocate to Canada, you may become subject to Canadian income tax. You should consult a cross-border tax advisor before making any move although Canada and the United States do have a double taxation agreement in place.) 

If your parent was born in Canada, you were almost certainly already a Canadian citizen under even the pre-Bill C-3 rules. The first-generation limit only cut off the second generation born abroad. 

If your grandparent was born in Canada and your parent was born in the United States, your parent is now recognized as a Canadian citizen (as the first generation born abroad), and you, as the second generation, are now also a citizen automatically under Bill C-3. 

If your great-grandparent was born in Canada, the same chain applies. Each generation is sequentially recognized as a citizen, cascading down to you. 

The critical requirement is an unbroken chain of descent. Each link in the chain must be documented with birth certificates or equivalent records showing the parent-child relationship. If any ancestor in the chain renounced Canadian citizenship, the chain breaks at that point. 

Important Considerations 

Processing times are expected to be lengthy. IRCC has acknowledged the volume of applications Bill C-3 will generate, and applicants should plan accordingly. 

The further back your Canadian ancestor, the more complex the documentation requirements become. Cases involving ancestors who emigrated in the 19th century, name changes, historical boundary shifts, and births under varying versions of the Citizenship Act can require specialized legal analysis. Working with a qualified immigration lawyer or Citizenship by Descent consultancy can make the difference between a successful application and a returned package. 

If you hold citizenship in a country that does not recognize dual nationality (such as China, India, Japan, or Saudi Arabia), acquiring or being recognized as having Canadian citizenship could have implications for your other citizenship. Consult a legal professional before proceeding. 

The Bigger Picture 

Bill C-3 closes one of the most significant and long-standing gaps in Canadian citizenship law. For decades, the rules were a maze of historical accidents, discriminatory provisions, and arbitrary cutoffs that left hundreds of thousands of people without the citizenship that should have been theirs. The ‘Lost Canadians’ saga was not a niche legal curiosity. It was the story of real families separated from a country they belonged to by laws that treated women as lesser, treated children as property, and punished people for administrative failures they never knew about. 

The law is now fixed. If you have Canadian ancestry, the question is no longer whether the law will recognize you. It is whether you can document the chain. 

If you believe you may qualify for Canadian Citizenship by Descent and would like help evaluating your eligibility or assembling your application, contact us for a consultation.