Binational Children: Brazil, CRBA, and Dual Nationality

Binational families face a recurring pair of questions, and they pull in opposite directions. A Brazilian living abroad asks: my child was born in another country — is she Brazilian? A foreign couple living in Brazil asks: our baby was born here — what does that make him, and what does it make us? Both questions have clear answers under Brazilian law, and they are more generous than most people expect.

This guide walks through the four situations that come up most for binational families: a child born abroad to a Brazilian parent; a child born in Brazil to foreign parents; the residency that a Brazilian-born child opens up for those foreign parents; and — because so many of these families are also American — how the United States documents a child’s US citizenship through a Consular Report of Birth Abroad. It is educational content prepared by our immigration team for parents navigating two legal systems at once.

A note on scope before we start. Our firm advises on Brazilian law. The US CRBA and US tax sections below are included because binational families genuinely need to understand how the pieces fit — but they are factual context only, drawn from public US government sources, and they fall outside Brazilian legal advice. For anything turning on US law, consult a qualified US attorney or tax adviser.

Is a child born abroad to a Brazilian parent automatically Brazilian?

Yes. A child born outside Brazil with at least one parent who was Brazilian at the time of the birth is Brazilian by descent. The status is native-born (brasileiro nato), and it exists from birth — the legal question is only how to prove and register it.

The home of this rule is art. 12, I, “c” of the Federal Constitution, the same provision behind Brazilian citizenship by descent. For a minor, the practical route is consular registration: the Brazilian parent registers the child’s foreign birth certificate — has it transcrita (transcribed) — at the nearest Brazilian consulate. From that registration flow the Brazilian birth record, a CPF (automatically issued for children under 18), and a passport, often at the same appointment.

The consulate’s procedure varies with the child’s age. As a general pattern:

Child’s age at registration	Who must appear / what is needed
Under 12	Only the Brazilian parent appears with the documents
12 to 17	The registrant, the Brazilian parent, and two witnesses
Under 18 (any age)	CPF is issued automatically; passport available at the same appointment

The important point for parents is that for a minor registered through the consulate, there is no later judicial step. The child is Brazilian nato unconditionally from birth — unlike the adult who was never registered and must pursue the nationality option before a federal judge. Registering early, while the child is young and the family still has convenient consular access, is by far the simpler path. For the generational logic — why this reaches a parent but not a grandparent — see our guides on citizenship through a parent born abroad and children of Brazilian parents abroad.

Legal basis: nationality by descent for a child born abroad to a Brazilian parent is set out in art. 12, I, “c” of the Federal Constitution. Consular registration of births abroad is the administrative route confirming that status; see the gov.br service for registering a birth abroad.

Is a child born in Brazil to foreign parents Brazilian?

In almost every case, yes — and this surprises many foreign families. Brazil applies jus soli (right of the soil): a child born on Brazilian territory is Brazilian by birth, automatically, with no application and no waiting period. The legal anchor is art. 12, I, “a” of the Federal Constitution.

There is exactly one narrow exception. A child born in Brazil is not Brazilian if both parents are foreign nationals and at least one is in the service of their country — in practice, both serving as foreign officials, such as diplomats on assignment. Read the condition carefully, because the marketing-style summaries get it wrong: the exclusion requires that the parents be foreign and in their country’s service. If only one parent is a foreign official, or if the parents are private workers, students, or tourists, the child is Brazilian.

So the typical cases all produce a Brazilian child:

• A foreign couple working private-sector jobs in Brazil → child is Brazilian.
• A foreign student couple → child is Brazilian.
• Foreign tourists who give birth while visiting → child is Brazilian.
• A diplomat married to a private-sector spouse → this is the grey zone; the exclusion is built around both parents being foreign officials, so individual analysis is essential.

The proof could not be simpler. There is no separate nationality application for a jus-soli child — the document that establishes Brazilian nationality is the ordinary birth certificate (certidão de nascimento) issued by the local civil registry office (Cartório de Registro Civil) where the birth is registered. That certificate is the child’s nationality proof.

Legal basis: jus soli is set out in art. 12, I, “a” of the Federal Constitution: those born in Brazil are Brazilian, even to foreign parents, unless the parents are at the service of their country. In RE 1.163.774 the Federal Supreme Court (STF) also extended nato nationality to foreign children adopted by Brazilians and registered through the consulate — a reminder that art. 12 is read broadly in favour of the child.

Does having a Brazilian child give the foreign parents residency?

Having a Brazilian child does not make the parents Brazilian, and it does not automatically grant them residency. What it does create is a strong entitlement to residence — one of the clearest family-reunion grounds in Brazilian migration law.

The anchor is art. 37, II of the Migration Law (Lei 13.445/2017), which provides for residence for family reunion to a foreign national “que tenha filho brasileiro” — who has a Brazilian child. In practice this leads to permanent residence on family-reunion grounds and the issuance of a CRNM (Carteira de Registro Nacional Migratório, the national migratory registration card) through the Federal Police (Polícia Federal). For the broader picture of the residence card itself, see our guide on the residence permit and CRNM in Brazil.

What the file looks like. The request is built around documents proving the family link and the parents’ good standing:

• The child’s Brazilian birth certificate — this is the document that proves the child is Brazilian and is the foundation of the request.
• Proof of parentage connecting the applicant to the Brazilian child.
• The parent’s valid passport.
• Criminal-record certificates covering the last five years.
• Proof of address in Brazil.

Foreign documents in this file generally need apostille or consular legalization and a sworn translation into Portuguese before they carry legal weight in Brazil.

Fees and timeline. The Federal Police charges a fee for processing the residence authorization and a separate fee for issuing the CRNM card. As published reference figures, these are roughly R$ 168.13 for the residence authorization (code 140066) and R$ 204.77 for the CRNM (code 140120) — confirm the current amounts against the official service before you pay. Once a complete file is in, issuance of the CRNM commonly runs around 30 business days, though the full process can take up to roughly 180 days depending on the unit and the file. Treat those as rough indications, not promises.

This residency entitlement also dovetails with other family routes — a foreign parent who is married to or in a união estável with a Brazilian may qualify on that basis too; see residency through union or marriage in Brazil.

Legal basis: residence for the foreign parent of a Brazilian child flows from art. 37, II of Lei 13.445/2017 (Migration Law), processed by the Federal Police, leading to the CRNM. The relevant gov.br service is “Obter Autorização de Residência e Carteira de Registro Migratório.”

How does the US CRBA work for a child born in Brazil? (US-law context only)

This section is factual context drawn from public US government sources. It is not Brazilian legal advice, and the US CRBA process falls outside what our firm advises on — for it you need US counsel. We include it because so many binational families in Brazil have one American parent and need to see how the pieces relate.

A Consular Report of Birth Abroad (CRBA, Form DS-2029) is a US State Department document certifying that a child born outside the United States acquired US citizenship at birth through a US-citizen parent. It is the US analogue to Brazil’s consular registration: it documents a citizenship the child already holds, rather than granting a new one. Families generally apply before the child turns 18, and the filing fee is US$100.

Whether US citizenship transmits depends on US statute, not Brazilian law. For births after 14 November 1986 with one US-citizen parent (INA §301(g)), the US parent must generally have been physically present in the United States for at least five years before the birth, at least two of which were after age 14. The US Supreme Court’s 2017 decision in Sessions v. Morales-Santana equalized these physical-presence rules between fathers and mothers. Where both parents are US citizens (INA §301(c)), the requirement is lighter — only that one parent had some prior US residence.

How a family in Brazil applies. The process runs through MyTravelGov and is completed in person at the US Embassy in Brasília or a US Consulate in São Paulo, Rio de Janeiro, Recife, or Porto Alegre. Typical documentation includes:

• The child’s long-form (inteiro teor) Brazilian birth certificate — the short form is not accepted.
• The US-citizen parent’s US passport.
• Evidence of physical presence in the US (school, tax, employment, medical, or bank records).
• The parents’ marriage certificate, the other parent’s ID, and Form DS-5507 where applicable.

The child’s first US passport is usually processed at the same appointment. Again: these are US requirements, summarized here as context. Confirm them with the US Embassy or qualified US counsel.

How do the Brazilian and US registrations fit together?

They fit together cleanly, because they are separate systems with no conflict between them. A child born in Brazil to a US-citizen parent can be Brazilian by birth (jus soli) and a US citizen by descent — and can hold both passports.

Question	Brazil	United States (context only)
Basis of nationality	Jus soli — born on Brazilian soil (CF art. 12, I, “a”)	Jus sanguinis — US-citizen parent (INA §301)
What documents it	Birth certificate (certidão de nascimento)	CRBA (Form DS-2029) + US passport
Application needed?	No — automatic at birth	Yes — apply, ideally before age 18
Travel rule	Use the Brazilian passport to enter/leave Brazil	US law requires the US passport to enter/leave the US

Brazil permits dual and multiple nationality, so confirming or holding a foreign nationality does not put the Brazilian status at risk — and since EC 131/2023, voluntarily acquiring another nationality no longer causes loss of Brazilian nationality at all. For the full treatment of holding two nationalities, see our dual citizenship in Brazil complete guide.

The one practical habit binational parents should build early is the two-passport travel rule: enter and leave Brazil on the Brazilian passport, and enter and leave the US on the US passport. It is not a conflict — it is simply each country asking its own citizens to identify themselves as such at the border.

Hypothetical illustration — not a real client.

Imagine a couple living in São Paulo — one parent a US citizen, the other a national of a third country, neither in any government’s service. Their baby is born in a São Paulo hospital.

Under Brazilian law the child is Brazilian by birth the moment she is born on Brazilian soil (art. 12, I, “a”); the family simply registers the birth at the local cartório and the certidão de nascimento is her nationality proof. Separately, the US-citizen parent gathers physical-presence evidence and the long-form birth certificate and books a CRBA appointment at a US consulate to document the child’s US citizenship by descent. Meanwhile the third-country parent, now the parent of a Brazilian child, files with the Federal Police for residence under art. 37, II of the Migration Law, building the file around the child’s Brazilian birth certificate. The child ends up holding two passports; her parents hold, respectively, US citizenship and a Brazilian residency authorization.

Every distinguishing detail here is invented. Real situations turn on their own facts and require individual analysis — including, for any US-law question, advice from US counsel. Nothing in this example predicts any outcome.

What obligations come with being Brazilian?

If a child in one of these situations is Brazilian, certain duties attach — most of them only from adulthood. They are worth flagging so families plan ahead, but they differ depending on which situation the child is in.

For a child born in Brazil (jus soli). The child is a full brasileiro nato with the ordinary duties of any native-born Brazilian, which mature at 18:

• Voting becomes compulsory for literate citizens from 18 to 69 (optional at 16–17 and 70+), under CF art. 14 §1º, which requires enrolling for a título de eleitor.
• Military service applies to males, who must enrol (alistamento) in the year they turn 18 (CF art. 143); most are then dispensed.
• Tax follows residency, not nationality — a Brazilian resident is taxed on worldwide income, while a Brazilian living abroad is generally not a Brazilian tax resident merely for being Brazilian.

Crucially, the foreign parents are not Brazilian because of the child. Their obligations are those attached to their residency authorization (keeping the CRNM valid, address updates, and so on), not the duties of a Brazilian citizen.

For a child born abroad to a Brazilian parent (the CRBA-type case). This child carries Brazilian nato duties and, if also a US citizen, US obligations. The US side — using the US passport to enter and leave the US, and being subject to US worldwide taxation plus FBAR/FATCA reporting regardless of residence — is a feature of US citizenship that falls outside Brazilian law. We flag it so families are not blindsided; the detail belongs to US counsel.

For the Brazilian-tax side specifically, our dual-citizen tax compliance checklist and Brazil tax residency and exit tax guides set out how residency — not the passport — drives Brazilian tax. The headline to keep straight: Brazilian tax follows residency, not citizenship.

What are the most common mistakes?

The errors cluster around assumptions imported from other systems, or from conflating the two countries’ rules.

• Assuming a Brazilian-born child of foreigners is not Brazilian. Jus soli is automatic; the birth certificate is the proof. The “both parents in foreign service” exception is narrow.
• Assuming the foreign parents become Brazilian. They do not — the child’s nationality gives the parents a residency entitlement, not nationality.
• Delaying consular registration of a child born abroad. Registering early, while the child is a minor, avoids the harder adult nationality-option route later.
• Bringing the short-form Brazilian birth certificate to a CRBA appointment. US consulates require the long-form (inteiro teor).
• Sourcing criminal-record certificates from the wrong country for the parents’ residency file — they must reflect where the parent actually lived in the last five years.
• Mixing up the travel rule. Enter/leave Brazil on the Brazilian passport; enter/leave the US on the US passport.
• Treating US tax as a Brazilian-law question. It is not — FBAR/FATCA and US worldwide taxation are US matters requiring US advice.

Binational children at a glance

Situation	Is the child Brazilian?	How it is proven / obtained	Key anchor
Born abroad, one Brazilian parent	Yes — nato by descent	Consular registration of the foreign birth certificate	CF art. 12, I, “c”
Born in Brazil, foreign parents	Yes — nato by jus soli	Local birth certificate (certidão de nascimento)	CF art. 12, I, “a”
Born in Brazil, both parents foreign officials	No	(Exception to jus soli)	CF art. 12, I, “a”
Foreign parent of a Brazilian child	Parent stays foreign	Residence → CRNM via Federal Police	Lei 13.445/2017, art. 37, II
US-citizen parent, child born in Brazil	(US side) US citizen by descent	CRBA (DS-2029) + US passport — US law	INA §301 (context only)

Key terms

• Jus soli — nationality by place of birth; a child born in Brazil is Brazilian (CF art. 12, I, “a”).
• Jus sanguinis — nationality by descent from a parent; a child born abroad to a Brazilian parent is Brazilian (CF art. 12, I, “c”).
• Brasileiro nato — native-born Brazilian; the status under both routes above.
• Certidão de nascimento — birth certificate; for a jus-soli child it is the nationality proof.
• CRNM — Carteira de Registro Nacional Migratório; the residence card foreign parents obtain.
• CRBA — Consular Report of Birth Abroad; the US document recording a child’s US citizenship by descent (US law).
• EC 131/2023 — the amendment that ended automatic loss of Brazilian nationality on acquiring another.

Key takeaways

• A child born in Brazil is Brazilian by birth (jus soli, CF art. 12, I, “a”) — automatically, proven by the birth certificate — unless both parents are foreign officials in their country’s service.
• A child born abroad to a Brazilian parent is Brazilian by descent (CF art. 12, I, “c”), confirmed by consular registration; a minor so registered is nato with no later judicial step.
• Having a Brazilian child does not make foreign parents Brazilian, but it gives them a strong residency entitlement under art. 37, II of the Migration Law, leading to permanent residence and the CRNM.
• The US CRBA documents a child’s US citizenship by descent; it is a separate US system that does not conflict with Brazilian nationality — the child can hold both passports.
• The travel rule: Brazilian passport into and out of Brazil; US passport into and out of the US.
• Brazilian tax follows residency, not citizenship; US worldwide tax and FBAR/FATCA apply to US citizens regardless of residence and are outside Brazilian legal advice.

Related guides on this site

• Brazilian citizenship by descent (jus sanguinis)
• Citizenship through a parent born abroad
• Children of Brazilian parents abroad
• Residency through união estável or marriage in Brazil
• The residence permit and CRNM in Brazil
• Dual citizenship in Brazil: the complete guide
• Dual-citizen Brazil tax compliance checklist

How ZS Advogados can help

Binational families straddle two legal systems, and the parts that look simple — registering a birth, proving a child’s nationality, getting the foreign parents settled — depend on a clean chain of documents and on choosing the correct route the first time. We advise on the Brazilian side; for US matters such as the CRBA and US tax, we coordinate with US counsel rather than advising on US law ourselves.

• Immigration and visas — consular registration of a child born abroad, residence for the foreign parent of a Brazilian child, the CRNM through the Federal Police
• International law — apostille and legalization of foreign birth, marriage, and parentage records, and cross-border civil documents
• Family law — binational families, proof of parentage and the family line, and coordinating Brazilian civil records for nationality and residence files

Book a consultation to have your family’s specific documents reviewed before you act.

Technical review by the ZS Advogados Associados immigration team, including co-founding partner Karina Peres Silvério (OAB/SP 331.050) and founding partner Zachariah Zagol (OAB/SP 351.356). Contact: contato@zsassociados.com — +55 (18) 3908-1653 — Presidente Prudente, SP.

Sources and legal basis

• Constitution of Brazil — art. 12 (jus soli and nationality by descent)
• Federal Supreme Court (STF) — RE 1.163.774 (adopted children born abroad)
• gov.br — Registrar nascimento no exterior (registering a birth abroad)
• Migration Law — Lei nº 13.445/2017, art. 37 (residence for family reunion)
• gov.br — Obter Autorização de Residência e Carteira de Registro Migratório (CRNM)
• US Embassy Brazil — Consular Report of Birth Abroad (CRBA)
• US Department of State — Birth Abroad
• US Department of State — Dual Nationality

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This guide is for informational and educational purposes only, in line with Provimento No. 205/2021 of the Brazilian Bar Association (OAB). It is not legal advice, an opinion, or an offer of services, does not refer to any specific case, and does not guarantee any result. It describes Brazilian law; the US CRBA, US tax (FBAR/FATCA), and other US-law matters are summarized as factual context only and fall outside Brazilian legal advice — consult qualified US counsel for those. Rules and provisions are cited as of June 2026; changes after that date are not reflected. Each situation requires individual analysis by a licensed attorney. Last updated June 2026.