- Bill C-3 lets some Mexican families pursue Canadian citizenship by descent if they prove an unbroken family line.
- Children born outside Canada on or after December fifteenth, twenty twenty-five need one thousand ninety-five days of parental presence.
- IRCC says proof-of-citizenship files can take more than two years, and applicants must submit reliable records.
Bill C-3 has opened a route for some Mexican families to claim Canadian citizenship by descent, and that status can lead to Canadian passports once they prove the family line. The proof comes first.
For children born outside Canada on or after December 15, 2025, a different rule now applies. If the Canadian parent was also born abroad, that parent must have had 1,095 days of physical presence in Canada before the child’s birth. That test is new.
For people born abroad before that date, the old first-generation limit no longer blocks the claim. A Mexican family can qualify if one ancestor was Canadian, through birth in Canada or some forms of naturalization, and each generation passed citizenship down without a break before the cutoff. Not every line survives.
Free toolCanada Express Entry Points CalculatorThe file is documentary, not ceremonial. Applicants usually need the Canadian ancestor’s birth certificate or naturalization record, then birth certificates for each generation linking the ancestor to the applicant. A citizenship certificate comes first. Then the passport.
Processing can be slow. Current reporting in August 2026 says proof-of-citizenship applications have taken more than two years. IRCC also updated guidance in June 2026, telling applicants to submit authentic, reliable and verifiable records for every generation in the chain. Keep the paper trail tight.
Mexican-born applicants already make up a fifth of approvals
Mexican-born applicants now account for 20.5 per cent of approvals under the expanded descent rules, behind U.S.-born applicants at 51 per cent. The totals keep climbing.
| Measure | Figure | Period |
|---|---|---|
| Citizenship certificates issued under the new rules | 6,100 | December 15, 2025 to May 31, 2026 |
| Additional certificates to people with a Canadian parent | 17,390 | December 15, 2025 to May 31, 2026 |
| Total people recognized as citizens | 23,490 | December 15, 2025 to May 31, 2026 |
| Mexican-born share of approvals | 20.5 per cent | Expanded citizenship-by-descent rules |
| U.S.-born share of approvals | 51 per cent | Expanded citizenship-by-descent rules |
Families start by mapping the oldest known Canadian ancestor
The next step is to map the oldest known Canadian ancestor. Then work forward. The line has to stay unbroken, and the birth dates decide which rule applies.