Status from birth and proof
Article 18 may attribute nationality through a French parent. The family chain and timely legal filiation still need proof.
French nationality family review
Could French nationality already have passed through your family?
Possibly. Start with whether a legal parent was French when you were born. Then check every earlier handoff, when parentage became legally effective, and whether loss, a territorial change, or Article 30-3 affects the proof.
- Identify one person, one decisive date, and one proof for each generation
- Separate existing status and CNF proof from acquisition
- Flag historical and parentage questions for manual review
Start my French family review
The screening organizes a potential process, family facts, evidence gaps, and issues for manual review. It does not decide French nationality or promise a CNF, declaration, decree, passport, or processing time.
Which French process may fit?
The route depends on whether nationality may already exist or would be acquired through a separate process.
Certificate of French nationality
A certificat de nationalité française, or CNF, proves an existing status. It does not grant nationality.
Limited declarations or personal reintegration
Specific routes cover some children, possession of status, spouses, ascendants, siblings, or people who personally lost nationality. They are not generic ancestry grants.
Naturalization and current routes
Naturalization is a separate prospective and discretionary acquisition process. French ancestry alone does not create an entitlement.
A French court or competent authority decides status or acquisition. ByLineage is private and may match a case with an independent specialist.
How do you check a French family line?
Move through each parent-child handoff. Give every person a status date and every link legal filiation evidence.
The grandparent relationship alone is not enough. There is no safe shortcut across an intermediate generation.
French source person
Status and date
How and when was this person French?
Check: CNF, judgment, published decree, registered declaration, and event-date records.
Each intermediate handoff
Parent at birth
Was the parent French when the next child was born?
Check: Full civil acts, timely legal filiation, loss records, and the applicable historical law.
Transmitting parent
Direct link
Was your legal parent French when you were born?
Check: The parent's status basis and effective date, plus your parentage record.
Applicant and correct process
Proof or acquisition
Are you proving existing status or considering a separate route?
Check: The current CNF or route-specific process and supporting records.
What should you write down first?
Do not begin with apostilles. First identify what each record must prove.
- Your birth date and when legal filiation with the claimed parent became effective.
- The claimed parent's French nationality basis and whether it existed at your birth.
- The same two facts for every earlier generation.
- Every foreign naturalization, loss, territory, adoption, or correction event and its effective date.
- French-status documents and residence history for you and the potentially transmitting parent.
French nationality guides
Start with the question that matches your family.
Can nationality pass through a parent or earlier ancestor?
What does a CNF prove?
Is the 50-year rule a countdown?
Did foreign naturalization cause loss?
How do parentage and adoption affect the case?
Was the ancestor connected to a former French territory?
Which records matter and where are they held?
What should be corrected before formalization?
How does the review work?
Answer the status question before choosing a form.
- 01
Map the people
Start with you and work backward through every legal parent-child link.
- 02
Fix the dates
Record nationality, filiation, naturalization, loss, and sovereignty dates.
- 03
Classify the proof
Separate civil status, possession evidence, and the instrument that created or proves nationality.
- 04
Choose the process
Organize a possible CNF or identify a separate declaration, reintegration, or naturalization boundary.
Scope and limits
Immileads can organize submitted facts and, where appropriate, match the case with an independent specialist.
The review can organize
- The parent-at-birth question and generation-by-generation chronology.
- A potential process, missing records, and archive leads.
- Historical, territorial, loss, parentage, adoption, and Article 30-3 questions for manual review.
What is not promised
- A finding that any person is or is not French.
- A CNF, declaration, decree, passport, or court result.
- A legal opinion or representation before a French authority.
- A fixed processing time.
Frequently asked questions
Read the full France FAQ for more detail.
Does a French parent make me French?
Possibly. Start with whether the parent was French when you were born and whether legal filiation became effective during the applicable minority.
Can I skip my parent and claim through a grandparent?
No. The grandparent relationship alone is not enough. Prove each intermediate handoff.
Does a CNF grant nationality?
No. It is formal proof of nationality that already exists.
Does nationality expire 50 years after emigration?
No. Articles 23-6 and 30-3 require distinct residence and possession facts. They are not an emigration-date calculator.
Did foreign naturalization always end French nationality?
No. The mechanism, effective date, and French law then in force control.
Does birth in a former French territory prove French status?
No. The territory, status, domicile, date, and exact transition instrument must be reviewed.