Guinea-Bissau

Last Updated: 2026-04-02

Official Portal: Government of Guinea-Bissau

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Quick Facts

Category	Details
Residency for naturalization	5 years of continuous residence
Language requirement	Knowledge of Portuguese (official language) expected
Civics test	None
Processing time	Variable; 12—36 months due to institutional capacity
Naturalization fee	Set by administrative regulation
Dual citizenship	Conditional — tolerated in some cases, particularly with Portugal and CPLP states
Citizenship by birth in Guinea-Bissau	Limited jus soli; primarily jus sanguinis
Citizenship by descent	Through either parent (post-independence law)
Governing law	Lei da Nacionalidade (Nationality Law); Constitution of Guinea-Bissau (1984, revised 1996)

Dual Citizenship

Guinea-Bissau’s position on dual citizenship is conditional and somewhat ambiguous in practice.

Legal framework:

The nationality law nominally requires renunciation of prior nationality upon naturalization.
However, in practice, dual citizenship is widely tolerated, particularly between Guinea-Bissau and Portugal due to the deep historical and colonial ties.
Many Bissau-Guineans hold Portuguese nationality (through the Portuguese Nationality Law’s provisions for former colonial subjects and their descendants), and the Guinea-Bissau government does not systematically enforce loss of citizenship in these cases.
As a member of the CPLP (Community of Portuguese Language Countries), Guinea-Bissau participates in reciprocal agreements that facilitate movement and residence among Lusophone nations (Portugal, Brazil, Cape Verde, Mozambique, Angola, Sao Tome and Principe, Timor-Leste).

Practical reality: Dual citizenship is common among the political and economic elite. Enforcement of single-nationality rules is inconsistent, making Guinea-Bissau a de facto tolerator of dual nationality even where the law is ambiguous.

Acquisition of Nationality

By Birth (Jus Soli)

Guinea-Bissau applies a limited jus soli:

A child born in Guinea-Bissau to at least one parent who is a permanent resident may acquire nationality.
Birth in the territory alone, to parents who are merely passing through, does not confer citizenship.
A child born in Guinea-Bissau to unknown or stateless parents is considered Bissau-Guinean.

By Descent (Jus Sanguinis)

Nationality is transmitted through descent from either parent:

A child born to a Bissau-Guinean father or mother acquires nationality at birth, regardless of place of birth.
The law applies equally to children born in or out of wedlock, provided parentage is legally established.
There is no generational limit explicitly codified, but proof of the parental connection is required.

Post-independence provision: At independence in 1974, persons born in the territory of Guinea-Bissau and their descendants were granted nationality. This “original nationality” provision anchors many current citizenship claims.

By Adoption

A minor child adopted by a Bissau-Guinean citizen may acquire nationality through administrative process. The adoption must be recognized under Guinea-Bissau’s civil law.

By Marriage

A foreign spouse of a Bissau-Guinean citizen may apply for nationality after the marriage has subsisted for a minimum period (typically 3 years). The marriage must be registered under the civil law, and the applicant must demonstrate genuine marital community and residence.

By Naturalization

Requirement	Details
Residence	5 years of continuous lawful residence
Good character	No serious criminal convictions
Language	Knowledge of Portuguese
Financial means	Ability to support oneself
Integration	Evidence of ties to Guinea-Bissau society
Renunciation	Renunciation of prior nationality (nominally required, inconsistently enforced)
Age	18+

Naturalization is granted by decree. Given Guinea-Bissau’s institutional challenges (frequent political instability, coups, and weak administrative capacity), processing times can be unpredictable.

Loss and Renunciation

Voluntary Renunciation

A citizen may renounce Bissau-Guinean nationality if they hold or are acquiring another nationality. The declaration must be made to the competent authority.

Involuntary Loss

Nationality may be lost when a citizen:

Voluntarily acquires a foreign nationality (though enforcement is inconsistent).
Serves in a foreign military without authorization.
Obtained citizenship through fraud — may be revoked.

In practice, loss of nationality proceedings are rare due to weak institutional enforcement.

Restoration of Nationality

Former citizens of Guinea-Bissau may apply for restoration. Requirements typically include:

Application to the Ministry of Justice or Interior
Proof of former nationality
Residence in Guinea-Bissau or intent to return
Good character

The process is discretionary and subject to political dynamics.

Stateless Persons and Foundlings

A foundling found in Guinea-Bissau is presumed to be a national.
Children born in the territory who would be stateless are entitled to nationality.
Guinea-Bissau has acceded to the 1954 Convention Relating to the Status of Stateless Persons.

Document Checklist

Completed nationality application form

Birth certificate (original + certified Portuguese translation if needed)

Valid passport or travel document

Proof of 5 years continuous residence in Guinea-Bissau

Criminal record certificate (local and from country of origin)

Proof of financial self-sufficiency

Marriage certificate (if applicable)

Passport-sized photographs (4)

Application fee receipt

Evidence of integration (employment, community ties)

Sources

Constitution of the Republic of Guinea-Bissau (1984, revised 1996) — Citizenship provisions. https://www.constituteproject.org/constitution/Guinea_Bissau_1996
Lei da Nacionalidade — Guinea-Bissau Nationality Law.
CPLP — Community of Portuguese Language Countries — Reciprocal movement and residence agreements. https://www.cplp.org/
ECOWAS Protocol on Free Movement of Persons (1979) — https://www.ecowas.int/
UNHCR Refworld — Guinea-Bissau — https://www.refworld.org/

Guinea-Bissau.gw

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