Citizenship by descent (CBD), also known as citizenship through ancestry or ancestral citizenship, is the process of acquiring nationality because you have a parent, grandparent, or sometimes great-grandparent who was a citizen of that country. It is based on the principle of jus sanguinis (“right of blood”), meaning citizenship is passed down through lineage rather than birthplace or residence. For those wondering how to get citizenship through ancestry, the key is proving an unbroken family link with official records such as birth, marriage, and citizenship documents.
This guide explains how citizenship by descent works, who qualifies, what documents you need, how many generations you can claim through, and which countries recognize ancestry-based citizenship. You will also learn about common challenges, practical benefits, and how to navigate different country rules.
- What is citizenship by descent?
- How does citizenship by descent work?
- Benefits of Acquiring Citizenship by Descent
- Who qualifies for citizenship by descent?
- Eligibility Criteria for Citizenship by Descent
- Required Documents for Citizenship by Descent
- Step-by-Step: How to Get Citizenship Through Ancestry
- Which countries offer citizenship by descent?
- Special Limitations and Edge Cases in Citizenship by Descent
- Common Challenges of Citizenship by Descent and How to Avoid Them
- Which countries offer citizenship by descent?
- Frequently Asked Questions
What is citizenship by descent?
Citizenship by descent is the process of acquiring nationality through your family lineage, rather than through birth in a country or long-term residence. Under the principle of jus sanguinis (“right of blood”), many countries automatically pass citizenship from parent to child, while others also allow claims through grandparents or even great-grandparents.
To qualify, you must show a clear, documented link to an ancestor who was legally a citizen at the time. This usually involves providing a chain of official records, such as birth, marriage, and citizenship certificates, that demonstrate your direct connection. The exact rules, generational limits, and eligibility conditions vary widely between countries, making documentation and accuracy essential.
How does citizenship by descent work?
Citizenship by descent works by proving an unbroken line of ancestry from you back to a citizen of the country you wish to claim citizenship from. Once you collect the required documents, you submit them to the relevant authority, usually a consulate, embassy, or national registry, which reviews your lineage, checks for gaps or renunciations, and confirms whether the citizenship link was lawfully retained.
If approved, the country formally recognizes you as a citizen, often without requiring language tests, residency, or integration requirements. Some applicants may need to register their birth abroad or complete a citizenship confirmation process, but the overall pathway is typically more straightforward than naturalization. Once recognized, you can apply for a passport, enjoy dual citizenship where permitted, and may pass citizenship on to your own children under the country’s current laws.
Benefits of Acquiring Citizenship by Descent
Obtaining citizenship by descent offers several valuable advantages, especially for applicants seeking global mobility, security, or European residency rights.
01/ Access to dual or multiple citizenship
Most countries that recognize citizenship through ancestry also permit dual citizenship. This allows you to keep your existing nationality while gaining the benefits of a second.
02/ A second passport with expanded travel freedom
Once your citizenship is confirmed, you can apply for a second passport, which may offer visa-free access, the ability to live or work abroad, or entry into regions such as the EU and the Schengen Area (depending on the country).
03/ No residency or language requirements
Unlike naturalization, most CBD programs do not require time spent living in the country, language tests, or integration exams. Eligibility is based on lineage, not physical presence.
04/ The right to live, work, and study internationally
European citizenship by descent can unlock full freedom of movement across EU/EEA countries, while other nationalities offer beneficial residence rights, employment access, or local benefits.
05/ Generational continuity
Citizenship acquired through ancestry can typically be passed on to your children, strengthening long-term family ties and creating future opportunities.
06/ Cultural and personal connection
For many applicants, citizenship by descent reinforces heritage, identity, and belonging, especially among families with a strong cultural or historical link to the country.
Who qualifies for citizenship by descent?
You may qualify for citizenship by descent if you can prove a direct biological connection to an ancestor who was a citizen of the country at the time your parent, grandparent, or great-grandparent was born.
Most countries allow claims through at least one parent, while others also recognize citizenship through grandparents, and a smaller number extend eligibility to great-grandparents under specific conditions.
Qualification depends on three main factors:
- Lineage: You must show a clear, unbroken bloodline to a past citizen.
- Timing: Your ancestor must have held citizenship legally at the time of the next generation’s birth.
- No loss of citizenship: Some countries deny claims if an ancestor renounced citizenship or naturalized elsewhere before the next generation was born.
Rules differ significantly between countries, so even if your relatives were born abroad, you may still be eligible. Adoption, name changes, and gaps in documentation can also affect eligibility and may require additional evidence.
Eligibility Criteria for Citizenship by Descent
While each country sets its own requirements, most citizenship by descent (CBD) programs rely on similar principles. You are typically eligible if:
- You descend from a citizen (parent, grandparent, or sometimes great-grandparent).
- Your ancestor did not lose or renounce citizenship before the next generation was born.
- You can demonstrate lineage through official, verifiable records.
- You meet any additional conditions, which may include generational limits, proof of residence by the parent, or specific historical dates tied to citizenship laws.
Some countries also impose:
- Maternal vs. paternal rules depending on the date of birth.
- Restrictions on claims through great-grandparents, or allow them only in restitution or diaspora cases.
- Requirements for registering births abroad before citizenship can be confirmed.
Overall, eligibility is strongest when the documentary trail is complete and consistent, allowing authorities to confirm your ancestral link with certainty.
Required Documentation for Citizenship by Descent
To apply for citizenship through ancestry, you must provide a continuous chain of official documents linking you to your citizen ancestor. These typically include:
Main documents
- Your birth certificate.
- Your parent’s and grandparent’s birth certificates.
- Marriage certificates showing name changes.
- Your ancestor’s proof of citizenship (passport, national ID, civil registry extract).
Supporting documents
- Death certificates (if relevant).
- Naturalization records (to verify that citizenship was retained or not renounced).
- Church or archival records when civil documents are missing.
Most countries may also require:
- Certified copies of all records.
- Apostilles or consular legalizations, depending on the country.
- Official translations into the local language.
- Consistent spelling and dates across documents to avoid delays or rejection.
A complete, well-organized documentation file makes the application process significantly smoother and increases the likelihood of approval, especially for claims involving multiple generations.
Step-by-Step: How to Get Citizenship Through Ancestry
Applying for citizenship by descent follows a clear process, but the exact steps vary by country and consulate. Below is the typical sequence applicants follow when claiming citizenship through ancestry:
01/ Confirm your eligibility
Begin by determining whether your parent, grandparent, or great-grandparent was legally a citizen and whether they retained that citizenship before the next generation was born. Check generational limits, maternal and paternal rules, and any country-specific dates that may affect eligibility.
02/ Gather all required documents
Collect birth, marriage, and citizenship records that create a continuous lineage from you to your ancestor. Ensure documents are certified, accurate, and match across names and dates. If a record is missing, you may need church archives, civil registries, or specialist researchers.
03/ Translate and legalize your documents
Most countries require official translations and either an apostille or consular legalization. This step is important, as incomplete or unverified documents are the most common reason for delays.
04/ Submit your application
Applications are usually filed at a consulate, embassy, or the country’s civil registry. You will submit your completed file, pay the application fee, and book an appointment if required. Some countries allow online pre-submission to reduce processing time.
05/ Wait for verification and approval
Authorities review your lineage, check citizenship records, and confirm there is no legal break in the bloodline. Processing times vary widely, from a few months to several years, depending on demand and the complexity of your case.
06/ Register your citizenship
Once approved, you may need to register your birth abroad or complete a citizenship confirmation process before your status is officially recognized. This final step establishes your place in the national civil registry.
07/ Apply for your passport
After your citizenship is confirmed, you can request a national ID and passport, gaining the rights and mobility associated with that country. Many applicants also obtain dual citizenship, where permitted.
Which countries offer citizenship by descent?
Many nations recognize the principle of jus sanguinis, allowing individuals to reclaim citizenship through their ancestors. These laws are especially common in Europe, where countries aim to preserve cultural ties with descendants of emigrants.
Citizenship by descent: Countries in Europe
| Country | Generational Limit | Key Conditions |
|---|---|---|
| Italy | Parents or grandparents only | Must show genuine link; processed centrally; 2025 reforms tightened rules |
| Ireland | Parents, grandparents (great-grandparents via FBR) | Must register in Foreign Births Register |
| Poland | No strict limit (typically 2–3 generations) | Ancestor must have been a Polish citizen and never renounced |
| Germany | Parents, grandparents | Proof of lineage; restitution applies for Holocaust descendants |
| Hungary | No strict limit | Proof of Hungarian ancestry; language ability sometimes required |
| Lithuania | Parents, grandparents, great-grandparents | Ancestor left Lithuania before 1990; strong documentation required |
| Latvia | Up to great-grandparents | Restitution for families displaced during Soviet era |
| Estonia | Parents, grandparents | Restitution pathway for descendants of former citizens |
| Croatia | Parents, grandparents (some 3rd gen cases) | Proof of ancestry; cultural connection sometimes required |
| Slovakia | Up to great-grandparents | Proof of Slovak origin; new laws allow deeper lineage |
| Slovenia | Parents, grandparents | Proof of connection and intent required |
| Portugal | Parents, grandparents | Prove an effective connection to the national community ensures a genuine link to Portugal. Includes Sephardic Jewish routes (Portugal citizenship by descent overall is now stricter) |
| Spain | Parents, grandparents | Prove family ties through official documents like birth and marriage certificates. Special Sephardic programs for Spanish citizenship by descent are time-limited |
| Romania | Parents, grandparents (some great-grandparent cases) | Proof of Romanian ancestor; lineage continuity required |
| Bulgaria | Up to great-grandparents | Proof of Bulgarian origin; strong documentation required |
| Greece | Up to great-grandparents | Proof of Greek origin; multi-generation claims recognized |
Citizenship by descent: Countries outside Europe
| Country | Generational Limit | Key Conditions |
|---|---|---|
| Israel | No strict limit (Jewish ancestry: Jews, children, grandchildren) | Law of Return grants automatic right to immigrate and obtain citizenship |
| Argentina | Parents only | Not offered beyond the first generation. Only individuals with an Argentine parent can acquire nationality through descent. |
| Brazil | Parents only | Child must be registered abroad to obtain Brazilian nationality |
| Mexico | Parents (grandparents only indirectly via parent first registering) | Parent must claim/confirm nationality first for grandparent-linked claims |
| Chile | Parents only | No citizenship by descent beyond first generation |
| Uruguay | Parents (complex diaspora rules) | Recognition for children of Uruguayans abroad; specific legal steps apply |
| Peru | Parents only | Must have at least one Peruvian parent |
| Colombia | Parents only | Child of Colombian parent born abroad must register |
| Paraguay | Parents only | No ancestry pathway beyond parents |
| Armenia | Parents, grandparents (diaspora-focused) | Proof of Armenian descent; repatriation-oriented |
| Lebanon | Father → child only | Patrilineal transmission only; limited maternal rights |
| South Africa | Parents only | Parents must be South African citizens; birth abroad must be registered |
Special Limitations and Edge Cases in Citizenship by Descent
While many people qualify for citizenship by descent, several legal and historical factors can affect eligibility. These limitations vary widely by country, and understanding them early can prevent delays or rejection.
01/ Maternal vs. paternal lineage rules
Some countries historically allowed citizenship to pass only through the father, or applied different rules depending on the child’s birth year. Although many laws have been modernized, older cases may still be subject to these restrictions, requiring additional documentation or court validation.
02/ Ancestors who renounced or lost citizenship
If an ancestor renounced their nationality, naturalized in another country, or lost citizenship under earlier laws, the lineage may be considered “broken.” In such cases, your eligibility depends on whether citizenship was lost before the next generation’s birth.
03/ Great-grandparent claims
Not all countries allow claims beyond grandparents. Those that do, often in Europe or Latin America, usually require strong documentation and proof that citizenship legally continued through each generation. Restitution-based programs may have more flexible rules but stricter evidence requirements.
04/ Adoption considerations
Some countries allow adopted children to claim citizenship by descent, but others recognize only biological lineage. Eligibility often depends on the adoption date, the adoptive parent’s citizenship status, and whether the adoption was legally registered.
05/ Name variations and inconsistent records
Differences in spelling, dates, or surnames across generations can trigger additional checks. In cases involving immigration, marriage, or transliteration, you may need supporting evidence, such as church records, census entries, or affidavits, to confirm identity.
06/ Unregistered births abroad
If your parent or grandparent was born outside the country and their birth was never registered, you may need to complete a late registration process before applying for citizenship. This is common in cases involving older records or large diaspora communities.
07/ Historical legal changes
Eligibility may depend on the law in force at the time your parent or ancestor was born. Some nationalities were lost automatically under older laws, while others only began recognizing maternal transmission after a certain date. Understanding these shifts is crucial for multi-generation claims.
Common Challenges of Citizenship by Descent and How to Avoid Them
Applying for citizenship through ancestry is usually straightforward when documents are complete, but several common issues can delay or derail an application.
01/ Missing or inconsistent records
Differences in names, spelling, or dates across birth and marriage certificates are one of the top reasons applications are questioned or rejected.
02/ Lack of apostilles, legalizations, or certified translations
Most countries require formally authenticated documents. Submitting uncertified copies or unofficial translations causes delays.
03/ Misunderstanding generational limits
Some applicants assume they qualify through a grandparent or great-grandparent when the country only permits claims through parents—or applies specific cut-off dates.
04/ Not verifying whether an ancestor renounced citizenship
If an ancestor naturalized elsewhere before the next generation was born, eligibility may be lost. This is a frequent oversight in multi-generation claims.
05/ Assuming DNA testing replaces documentation
A DNA test may support evidence but cannot substitute official lineage records. Without proper certificates, most authorities cannot approve the application.
06/ Incomplete or disorganized submissions
Authorities commonly request corrections or additional documents when an application is unclear, missing pages, out of order, or lacking supporting evidence.
07/ Long processing times in high-demand countries
Some countries experience backlogs of 12+ months. Filing at the wrong consulate, or with missing documents, can extend the timeline significantly.
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