Portuguese citizenship by descent: who qualifies, the law, and what it takes

Q: Can you claim Portuguese citizenship through a parent?

Likely. A child of a Portuguese parent is Portuguese by origin and only needs to declare it and register the birth.

Q: Can you claim Portuguese citizenship through a grandparent?

Possible. Grandchildren of a Portuguese citizen can be Portuguese by origin if they show effective ties, which since May 2026 means passing a test in the Portuguese language and culture, and the grandparent's nationality must never have been lost.

Q: Can you claim Portuguese citizenship through a great-grandparent?

Unlikely. Great-grandchildren have no route by origin. Since May 2026 they may be naturalised, at the Government's discretion, after five years of legal residence in Portugal; a parent or grandparent who becomes Portuguese first opens the simpler line.

Through a parentChild of a Portuguese citizen Through a grandparentGrandchild with effective ties Through a great-grandparentGreat-grandchild naturalisation (2026 law)

Routes: Child of a Portuguese citizen (Art. 1(1)(c)) · Grandchild with effective ties (Art. 1(1)(d)) · Great-grandchild naturalisation (2026 law)
Dual citizenship: Kept on every open route
Cutoff: 19 May 2026
Language: Portuguese: a test or certificate in the Portuguese language and culture, history and symbols (Law 37/81 art. 6(1)(c), for grandchildren since 19 May 2026)
Comes with: EU citizenship: the right to live and work in 27 countries

The stamps assume no one in the line became a citizen of another country before the next person in the line was born. What changes each answer is below.

On this page

01Who qualifies
02Dates that matter
03Mothers’ lines
04Keeping your citizenship
05The routes and the law
06The documents
07What it takes
08Where the records live
09Law changes
10Other doors
11Sources

01Who qualifies

Who qualifies, generation by generation

LIKELY

Can you claim Portuguese citizenship through a parent?

Child of a Portuguese citizen

A child of a Portuguese parent is Portuguese by origin and only needs to declare it and register the birth.

Children of a Portuguese mother or father born abroad are Portuguese by origin if their birth is registered in the Portuguese civil registry or they declare that they wish to be Portuguese. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(c)

POSSIBLE

Can you claim Portuguese citizenship through a grandparent?

Grandchild with effective ties

Grandchildren of a Portuguese citizen can be Portuguese by origin if they show effective ties, which since May 2026 means passing a test in the Portuguese language and culture, and the grandparent's nationality must never have been lost.

What would settle itWhether someone in the family can pass the Portuguese language and culture test, and whether the grandparent ever lost Portuguese nationality.

Persons with at least one grandparent of original Portuguese nationality who never lost it are Portuguese by origin if they declare it and have effective ties to the national community. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(d)
Since 19 May 2026 a grandchild must also pass a test, or hold a certificate, in the Portuguese language and culture, history and national symbols, and know citizens' rights and duties. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(3) with Art. 6(1)(c)-(e)
The Central Administrative Court South upheld a grandchild's claim through a grandfather who never lost Portuguese nationality, even though the parent's filiation was only established late in life. Central Administrative Court South, judgment of 3 February 2022, case 375/21.8BELSB (grandchild of a Portuguese citizen)

What changes the answer

POSSIBLE
If you had already applied by 19 May 2026
Applications pending on 19 May 2026 are decided under the law as it stood before Organic Law 1/2026, where sufficient knowledge of Portuguese established the ties. Organic Law 1/2026 of 18 May 2026 (in force 19 May 2026), art. 7(2)
POSSIBLE
If you have a criminal conviction or charges pending
The bar is a final conviction to more than three years of effective imprisonment for terrorism, violent or highly organised crime, crimes against state security or aiding illegal immigration, or being a security threat. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 6(1)(f)-(h)
POSSIBLE
If you can’t pass the Portuguese language requirement
Grandchildren of a Portuguese citizen can be Portuguese by origin, but since May 2026 only after passing a test in the Portuguese language and culture; until then the route is closed to you.

UNLIKELY

Can you claim Portuguese citizenship through a great-grandparent?

Great-grandchild naturalisation (2026 law)

Great-grandchildren have no route by origin. Since May 2026 they may be naturalised, at the Government's discretion, after five years of legal residence in Portugal; a parent or grandparent who becomes Portuguese first opens the simpler line.

What would settle itWhether your parent or grandparent can become Portuguese first, which would make you a child or grandchild of a Portuguese citizen; otherwise, whether the family would live in Portugal for five years.

The Government may grant naturalisation, without the ordinary residence period, to third-degree descendants of original Portuguese nationals who have lived legally in Portugal for at least five years. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 6(8)
Nationality by origin reaches children and, with effective ties, grandchildren. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(c)-(d)

02Dates that matter

The dates that matter

2026
19 May 2026
Since 19 May 2026 a grandchild must also pass a test, or hold a certificate, in the Portuguese language and culture, history and national symbols, and know citizens' rights and duties. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(3) with Art. 6(1)(c)-(e)
2026
19 May 2026
Applications pending on 19 May 2026 are decided under the law as it stood before Organic Law 1/2026, where sufficient knowledge of Portuguese established the ties. Organic Law 1/2026 of 18 May 2026 (in force 19 May 2026), art. 7(2)

What counts as having applied by 19 May 2026: A nationality application already pending when Organic Law 1/2026 entered into force on 19 May 2026 (art. 7(2)).

03Mothers’ lines

How mothers’ lines were treated

Portugal’s rule gives the same answer whether the line runs through a mother or a father. Where its reasons speak of mothers or fathers, they say:

Children of a Portuguese mother or father born abroad are Portuguese by origin if their birth is registered in the Portuguese civil registry or they declare that they wish to be Portuguese. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(c)

04Keeping your citizenship

Dual citizenship with your home country

You keep your citizenship.

On every open route, the rule lets a citizen of the United States, Canada, the United Kingdom, Australia, New Zealand, Brazil, Argentina or South Africa keep that citizenship.

Portugal permits dual nationality. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026

05The routes

Every route, and the law behind it

Child of a Portuguese citizen

Open through a parent

LIKELY
Through a parent

The law

Children of a Portuguese mother or father born abroad are Portuguese by origin if their birth is registered in the Portuguese civil registry or they declare that they wish to be Portuguese. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(c)

Grandchild with effective ties

Open through a grandparent

POSSIBLE
Through a grandparent
POSSIBLE
Through a grandparent, if you can’t pass the Portuguese language requirement

The law

Persons with at least one grandparent of original Portuguese nationality who never lost it are Portuguese by origin if they declare it and have effective ties to the national community. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(d)
Since 19 May 2026 a grandchild must also pass a test, or hold a certificate, in the Portuguese language and culture, history and national symbols, and know citizens' rights and duties. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(3) with Art. 6(1)(c)-(e)
The Central Administrative Court South upheld a grandchild's claim through a grandfather who never lost Portuguese nationality, even though the parent's filiation was only established late in life. Central Administrative Court South, judgment of 3 February 2022, case 375/21.8BELSB (grandchild of a Portuguese citizen)
Applications pending on 19 May 2026 are decided under the law as it stood before Organic Law 1/2026, where sufficient knowledge of Portuguese established the ties. Organic Law 1/2026 of 18 May 2026 (in force 19 May 2026), art. 7(2)
The bar is a final conviction to more than three years of effective imprisonment for terrorism, violent or highly organised crime, crimes against state security or aiding illegal immigration, or being a security threat. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 6(1)(f)-(h)

What would settle an unsure case

Whether someone in the family can pass the Portuguese language and culture test, and whether the grandparent ever lost Portuguese nationality.
Whether your grandparent ever lost Portuguese nationality; your pending application runs under the earlier rules.

Great-grandchild naturalisation (2026 law)

Closed: no open answer on this route

UNLIKELY
Through a great-grandparent
Great-grandchildren have no route by origin. Since May 2026 they may be naturalised, at the Government's discretion, after five years of legal residence in Portugal; a parent or grandparent who becomes Portuguese first opens the simpler line.

The law

The Government may grant naturalisation, without the ordinary residence period, to third-degree descendants of original Portuguese nationals who have lived legally in Portugal for at least five years. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 6(8)
Nationality by origin reaches children and, with effective ties, grandchildren. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(1)(c)-(d)

What would settle an unsure case

Whether your parent or grandparent can become Portuguese first, which would make you a child or grandchild of a Portuguese citizen; otherwise, whether the family would live in Portugal for five years.

06The documents

The documents, as the rule lists them

Child of a Portuguese citizen

Through a parent

Your parent's Portuguese birth record or citizen card
Your birth certificate, apostilled and translated
Your parents' marriage certificate

Grandchild with effective ties

Through a grandparent

Your grandparent's Portuguese birth record
Your parent's birth record showing the Portuguese grandparent
Your birth certificate
A Portuguese language and culture certificate or test result
Criminal record certificates

Most countries also want proof that no one in the line became a citizen elsewhere before the next birth: the naturalization record with its date, or a letter that none exists.

07What it takes

What it takes: time, cost, the hard part, who decides

Child of a Portuguese citizen

Time: 6–12 months for the registration (transcrição), then 4–8 weeks for the Cartão de Cidadão and passport.
Cost: About $400–700: registration fee, apostilles and certified translations.
The hard part: Your parent’s Portuguese birth record and, if they married abroad, registering that marriage in Portugal first.
Who decides: The Portuguese consulate for your address, or the Conservatória dos Registos Centrais in Lisbon.
The first record: Your parent’s Portuguese birth record (assento de nascimento), from The Conservatória do Registo Civil of their birthplace, or Civil Online. Request the certidão online with the name, date and parish; €10, delivered as a PDF in a few days. civilonline.mj.pt

How it’s filed

Where: The Portuguese consular post for your area (Boston, New Bedford, Providence, New York, Newark, the Washington embassy's consular section, San Francisco), which forwards it to the Conservatória dos Registos Centrais in Lisbon; or mailed directly to the Conservatória dos Registos Centrais. office list
How: By post; no appearance needed
Form: Modelo 1C (maior de 18 anos): Declaração para Atribuição da Nacionalidade Portuguesa, Art. 1(1)(c)
Appointments: Per post: New York and Boston accept this by post (no appointment); Newark takes it in person only, booked on Acuity Scheduling (no email or phone bookings).. Acuity Scheduling is a plain booking page an agent can operate; slots are the consulate's. Check the post's own page before booking: jurisdiction is by state of residence. No Newark-specific anti-automation clause was found; Acuity's own platform terms bar automated/bulk booking abuse generally, but that was not independently confirmed for the consulate's account.
Fee: About $257
Decision: 6–18 months

What goes in the file (9)

Modelo 1C, filled in Portuguese in block capitals, signature recognized (in New York: notarized by a notary in NY, CT or MI; otherwise at the consulate)
Your full (long-form) birth certificate, certified; apostilled unless the consulate waives it for states in its own area
One recent colour passport photograph
Copy of your valid passport
Copy of the Portuguese parent's Cartão de Cidadão or ID card (or their certidão de nascimento / registration details)
If one parent is not Portuguese: that parent's full birth certificate and a copy of their valid passport
Proof of your address in the consular area (driver's license, bank statement or utility bill)
If your parents were not married at your birth: proof that filiation to the Portuguese parent was established while you were a minor (e.g. a parentage certificate from the hospital or health department)
Payment: U.S. Postal money order to the consulate (and, by post, a prepaid Express Mail flat-rate envelope)

What goes wrong (10)

Fee at the consulate: 'Registo Nascimento - atribuição nacionalidade (+18anos)', Act 35 of the consular fee table, $256.99 (New York, September 2026). Filed straight with the IRN it is €175 (Art. 18 of the Regulamento Emolumentar).
Newark: 'current delays of over 1 year at the Central Registry in Lisbon' (September 2026). This is longer than the takes' 6–12 months.
Newark requires an apostille only on certificates issued outside NJ, PA and DE; Boston only on certificates issued outside the U.S. Apostille anyway if the post's page asks for it.
Declarations missing the fee are refused outright with no refund; declarations on a non-IRN form, with missing entries or missing documents, are refused likewise.
Signature recognition for direct mailing to Lisbon must be by a Portuguese consulate, notary or conservatória, a Portuguese lawyer or solicitor, or a recognized chamber of commerce (form Modelo 1C).
The Lei Orgânica 1/2026 reform left Art. 1(1)(c) unchanged: a child of a Portuguese parent is Portuguese by origin on registering the birth or declaring.
From CA: the Portuguese embassy in Ottawa and the consulates in Canada take the same Modelo 1C (unverified: which posts and their CAD fees).
From BR: Portuguese consulates in Brazil run very large nationality caseloads; mailing directly to the Conservatória dos Registos Centrais is common. No translation needed.
From GB, AU, NZ, ZA, AR: same form and fee through the local Portuguese consulate or by post to Lisbon; English and Spanish records need no translation.
Two posts are not in the posts list above because this pass could not confirm them fully: Consulate Providence, RI (existence confirmed, street address not found) and the Washington embassy's consular section (street address 2012 Massachusetts Avenue NW, Washington, DC, per a 2026-09-25 search snippet, but its full state jurisdiction is explicitly incomplete in that source).

Checked 25 September 2026 · source ↗

Grandchild with effective ties

Time: 18–30 months. Portugal’s registry is slow; a lawyer in Lisbon shortens it a little.
Cost: About $600–1,200: the €175 fee, apostilles, translations, and usually a lawyer.
The hard part: Showing an ‘effective tie’ to Portugal: knowledge of Portuguese (A2), or visits, property or community membership. Since the reform that took effect 19 May 2026, the Portuguese grandparent must be Portuguese ‘originária’ (Portuguese from birth, not naturalised), and applicants also have to show knowledge of Portuguese culture, history and civic institutions, not just the language. A language certificate remains the cleanest proof of the language piece. Applications filed before 19 May 2026 keep the old, lighter rules.
Who decides: The Conservatória dos Registos Centrais, via the consulate or a Portuguese lawyer.
The first record: Your grandparent’s Portuguese birth record, from Civil Online, or the parish’s Conservatória. Request the certidão with the name, approximate date and parish (concelho); older records may need the district archive. civilonline.mj.pt

How it’s filed

Where: By post to the Conservatória dos Registos Centrais, Rua Rodrigo da Fonseca 198, 1099-003 Lisboa, Portugal, or online through a Portuguese lawyer or solicitor. U.S. consulates (Boston, Newark) do not take grandchild files. office list
How: By post; you appear in person
Form: Modelo 1D (maior de 18 anos): Declaração para Atribuição da Nacionalidade Portuguesa, Art. 1(1)(d)
Appointments: None for the filing itself; the signature is recognized at a Portuguese consulate appointment (per-post system) unless a Portuguese lawyer files with a power of attorney.. The URL is the IRN payment portal for the €175 fee; pay before posting, since unpaid files are refused without refund.
Fee: About $199
Decision: 12–36 months

What goes in the file (9)

Modelo 1D, filled in Portuguese in block capitals, signature recognized in person (Portuguese consulate, notary, lawyer or solicitor)
Your full (long-form) birth certificate, apostilled
Your parent's full birth certificate (the grandparent's child), apostilled; mandatory when that parent was born abroad
The Portuguese grandparent's birth certidão, or the Civil Online access code
Criminal record certificates from your country of birth, of nationality and every country you have lived in since age 16 (for a U.S. citizen: the FBI Identity History Summary, apostilled by the U.S. Department of State)
Authenticated copy of your passport
Proof of sufficient knowledge of Portuguese (Art. 25 of the Nationality Regulation, e.g. an A2 certificate)
From 19 May 2026: proof of knowledge of Portuguese culture, history and national symbols, of the rights and duties of nationality and the political organisation of the State, and a solemn declaration of adherence to the democratic rule of law (Art. 1(3) → Art. 6(1)(c)–(e)); the form of proof awaits the amended regulation
Proof of payment of €175 (IRN online payment)

What goes wrong (8)

Lei Orgânica 1/2026 (published 18 May 2026, in force 19 May 2026) added Art. 1(3): the grandchild route now requires Art. 6(1)(c)–(h), i.e. a test or certificate of Portuguese language AND culture, history and national symbols, knowledge of rights and duties and the political organisation of the State, a solemn declaration of adherence to democratic principles, and the criminal-record, security and sanctions conditions.
Files lodged before 19 May 2026 keep the old rules (Art. 7(2) of the 2026 law).
The Government had 90 days to amend the Nationality Regulation (to about mid-August 2026). No amended regulation was found as of this check (unverified absence); until it defines the culture/civics test, the IRN's accepted proof is unknown. Filing now risks a request for further proof.
The grandparent must be Portuguese 'originário' and must not have lost Portuguese nationality (Art. 1(1)(d), republished text).
If the member's parent is alive, the parent can usually file as a child (Art. 1(1)(c)) and the member then files as a child too: fewer conditions and no culture test.
The justica.gov.pt guidance page for grandchildren still shows the pre-2026 conditions (September 2026).
Criminal-record rule: certificates from the countries of birth and nationality may be dispensed with if you show residence in another country after 16; the Portuguese record is obtained by the CRC itself if you tick the box.
From BR: nationals of Portuguese-speaking countries are presumed to know the language (Art. 6(10)), which covers the language half of Art. 6(1)(c) but not the culture/history half.

Checked 25 September 2026 · source ↗

Estimates are honest ranges from official fee tables and what families report; where a fee or time could not be confirmed, it says so.

08Where the records live

Where each record lives, and how to ask for it

birth1911–2026
The Portuguese civil registry (IRN): the Conservatória do Registo Civil of the place of birth. Any conservatória can issue a certidão from the national system; Civil Online issues an online certidão (an access code) that Portuguese authorities accept in place of paper.
Civil Online asks for the registration details; with only the name, date and freguesia, write to the Conservatória of the concelho of birth (template). Books older than 100 years are transferred to the district archive, so a birth before about 1926 may already be at the Arquivo Distrital.
Ask
Online, in Portuguese · request page ↗
Fee
10 EUR (about $11)
Takes
1–4 weeks
Good to know (5)
- €10 online certidão (access code, valid six months); a paper certidão de registo is €20 at a conservatória and $23.37 at the New York consulate.
- Anyone may request a certidão of their own or a third party's civil record.
- The certidão shows marginal notes (averbamentos): check it for any loss of Portuguese nationality, which breaks the grandchild route.
- For the grandchild route the Portuguese grandparent must be Portuguese 'originário' (from birth), per the republished Art. 1(1)(d).
- Unverified: Civil Online's data requirements when the assento number is unknown; the takes' 'name, date and parish' may not suffice for older entries.
Checked 25 September 2026 · source ↗
birth1500–1910
The Arquivo Distrital of the district (DGLAB), which holds the parish registers (baptisms, marriages, deaths) up to 1911, when civil registration became mandatory; books pass to the district archive 100 years after their last entry.
Find the freguesia's register in DigitArq (the district archives' online catalogue with scanned books), note the reference code, and order the certified copy through CRAV or by email to that district archive.
Ask
Online, in Portuguese · request page ↗
Search
DigitArq (Portuguese archives catalogue and scans)
Takes
2–13 weeks
Good to know (3)
- CRAV needs a free account (login wall), so an agent can prepare but a member-owned login is needed to submit.
- Unverified fee: each district archive publishes its own price table; certified copies are typically a modest fixed charge.
- tombo.pt is a private volunteer index of Portuguese parish records; useful for finding the book, not an official source.
Checked 25 September 2026 · source ↗
marriage1911–2026
The Conservatória do Registo Civil where the marriage was entered; a Portuguese citizen's marriage abroad is registered (transcribed) through the consulate or the Conservatória dos Registos Centrais.
Needed for a Portuguese ancestor's marriage in Portugal, or to show the chain; use Civil Online with the registration details.
Ask
Online, in Portuguese · request page ↗
Fee
10 EUR (about $11)
Takes
1–4 weeks
Good to know (1)
- Unverified at a primary source: practitioners report the registry sometimes asks for the Portuguese parent's foreign marriage to be transcribed first; budget for it when the parents married abroad.
Checked 25 September 2026 · source ↗

Translations

Into: Portuguese
Who may translate: No translation needed
About: $0–$60 a page

The IRN nationality forms state that documents in English, French or Spanish need no translation unless presentation of one is required (the IRN waiver applies when the official reads that language). U.S., British, Canadian, Australian, New Zealand and Argentine records usually go untranslated; Brazilian records are already in Portuguese. When a translation is asked for, it must be certified under Portuguese law (a Portuguese notary, lawyer, solicitor or certified translator, or a Portuguese consulate). The $60 top is an unverified market rate.

Checked 25 September 2026 · source ↗

The passport

Where: The Portuguese consular post for your area, in person (biometrics), after the birth is registered in Portugal. Unverified: whether the post requires the Cartão de Cidadão first. The Cartão de Cidadão is $26.87 over age 25 (New York table). Days are unverified.
Fee: About $88
Time: 2–9 weeks

Checked 25 September 2026 · source ↗

09Law changes

Recent and pending changes

The legislative watch has no pending bill or recent ruling recorded for Portugal.

Already in the rule

Since 19 May 2026 a grandchild must also pass a test, or hold a certificate, in the Portuguese language and culture, history and national symbols, and know citizens' rights and duties. Portuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026, Art. 1(3) with Art. 6(1)(c)-(e)
Applications pending on 19 May 2026 are decided under the law as it stood before Organic Law 1/2026, where sufficient knowledge of Portuguese established the ties. Organic Law 1/2026 of 18 May 2026 (in force 19 May 2026), art. 7(2)

The watch re-reads the official pages behind this guide every day. When one changes, a person re-checks the rule before anything here moves.

10Other doors

If descent doesn’t reach you

4 residence programs lead to Portugal without an ancestor, each with its own law and road to citizenship.

11Sources

Every source on this page

3 laws and official pages behind the answers, then the offices and pages behind the records and filing. Records and filing checked 25 September 2026.

LawPortuguese Nationality Law (Law 37/81), as republished by Organic Law 1/2026 · Art. 1(1)(c); Art. 1(1)(d); Art. 1(3) with Art. 6(1)(c)-(e); Art. 6(1)(f)-(h); Art. 6(8); Art. 1(1)(c)-(d)
LawCentral Administrative Court South, judgment of 3 February 2022, case 375/21.8BELSB (grandchild of a Portuguese citizen)
LawOrganic Law 1/2026 of 18 May 2026 (in force 19 May 2026) · art. 7(2) · checked 25 September 2026
RecordsThe Conservatória do Registo Civil of their birthplace, or Civil Online: Your parent’s Portuguese birth record (assento de nascimento) · checked 25 September 2026
RecordsHow to file: Child of a Portuguese citizen · checked 25 September 2026
RecordsModelo 1C (maior de 18 anos): Declaração para Atribuição da Nacionalidade Portuguesa, Art. 1(1)(c) · checked 25 September 2026
RecordsPer post: New York and Boston accept this by post (no appointment); Newark takes it in person only, booked on Acuity Scheduling (no email or phone bookings). · checked 25 September 2026
RecordsModelo 1D (maior de 18 anos): Declaração para Atribuição da Nacionalidade Portuguesa, Art. 1(1)(d) · checked 25 September 2026
RecordsNone for the filing itself; the signature is recognized at a Portuguese consulate appointment (per-post system) unless a Portuguese lawyer files with a power of attorney. · checked 25 September 2026
RecordsRequerimento para aquisição da nacionalidade portuguesa por naturalização (IRN; the amended regulation may issue a model specific to Art. 6(8)) · checked 25 September 2026
RecordsBirth records, 1500–1910: The Arquivo Distrital of the district · checked 25 September 2026
RecordsDigitArq (Portuguese archives catalogue and scans) · checked 25 September 2026
RecordsTranslations into Portuguese · checked 25 September 2026
RecordsThe passport: where, the fee and the wait · checked 25 September 2026

Not legal advice. Postern’s rulebook is written from the statutes and tested against documented cases; where the law is unsettled, the answer says “possible” or “unsure” rather than guess.

Who qualifies, generation by generation

Can you claim Portuguese citizenship through a parent?

Can you claim Portuguese citizenship through a grandparent?

What changes the answer

Can you claim Portuguese citizenship through a great-grandparent?

The dates that matter

How mothers’ lines were treated

Dual citizenship with your home country

Every route, and the law behind it

The law

The law

What would settle an unsure case

The law

What would settle an unsure case

The documents, as the rule lists them

Child of a Portuguese citizen

Grandchild with effective ties

What it takes: time, cost, the hard part, who decides

Child of a Portuguese citizen

How it’s filed

Grandchild with effective ties

How it’s filed

Where each record lives, and how to ask for it

Translations

The passport

Recent and pending changes

Already in the rule

If descent doesn’t reach you

Every source on this page

Check your family for Portugal.