Citizenship by Adoption

Learn when a foreign national adopted by a Portuguese citizen can acquire Portuguese citizenship, the requirements and the documents. Talk to our team.

Legal basis: Law 37/81, the Nationality Act (Lei da Nacionalidade)

A foreign national adopted by a Portuguese citizen acquires Portuguese citizenship by declaration (Art. 5 of the Nationality Act (Lei da Nacionalidade), as amended by Organic Law 1/2026 (Lei Orgânica), in force since May 19, 2026), provided that none of the grounds for opposing the acquisition of citizenship set out in Art. 9 of the same law applies.

Requirements

A foreign national adopted by a Portuguese citizen may acquire Portuguese citizenship by declaration, provided that:

  • The adoption was granted or confirmed by a final and unappealable decision;*
  • They have ties of effective connection to the Portuguese community, assessed according to the parameters of Art. 6(1)(c) to (i) of the Nationality Act (including knowledge of the Portuguese language and culture, no sentence of actual imprisonment of more than 3 years for the crimes set out in the law, and no threat to national security); and
  • They have not held public office of a not predominantly technical nature nor performed non-compulsory military service for a foreign State.


*If the adoption judgment was issued by a foreign court, it can only be relied on for purposes of acquiring citizenship after being reviewed and confirmed by a Portuguese court through proceedings for the recognition (review) of a foreign judgment in Portugal (revisão e confirmação de sentença estrangeira) (Arts. 978 et seq. of the Portuguese Code of Civil Procedure).

Fee: €250 (adults). For minors, please contact us.

Documents

If the adoptee was born abroad, the following documents are required:

  • Birth registration certificate, if possible a full copy issued by photocopy, duly legalized and accompanied by a translation, if written in a foreign language;
  • Birth registration certificate of the Portuguese adoptive parent, a full copy and, if possible, issued by photocopy. This birth registration certificate can be obtained ex officio by the registry services;
  • Certificate of the decision that granted the adoption. If the decision was issued by a foreign court, it must first be reviewed and confirmed by a Portuguese court, unless it is a decision issued in a country with which an Agreement has been concluded waiving review and confirmation of the judgment. As a rule, the Portuguese court that granted the adoption or that reviewed and confirmed the foreign decision sends a certificate ex officio to the competent Registry Office (Conservatória); and
  • Documents proving effective connection to the Portuguese Community.

If the adoptee is over 16:

  • Criminal record certificates issued by the competent authorities of the country of birth and of nationality, as well as of the countries where the applicant has had or has residence since age 16, accompanied by a translation if written in a foreign language; and
  • Documents proving the nature of any public office held or non-compulsory military service performed for a foreign State, where applicable; these documents are only submitted if the applicant has been in these circumstances.

If the adoptee was born in Portugal, the following documents are required:

  • Birth registration certificate of the Portuguese adoptive parent, a full copy and, if possible, issued by photocopy. This birth registration certificate can be obtained ex officio by the registry services; and
  • Certificate of the decision that granted the adoption, for annotation on the adoptee's birth record. As a rule, the court that grants the adoption sends a certificate ex officio to the competent Registry Office (Conservatória).

Step by step – receipt and review of documents

Learn how the process works to verify whether your family has a right to Portuguese citizenship

Frequently asked questions

Common questions

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Can someone adopted by a Portuguese citizen acquire Portuguese citizenship?

Yes. A foreign national adopted by a Portuguese citizen acquires citizenship by declaration (Art. 5 of the Nationality Act, as amended by Organic Law 1/2026), provided that none of the grounds for opposition set out in Art. 9 of the same law applies. The fee is €250 for adults; for minors, the amount should be checked.

What are the requirements for citizenship by adoption?
  • adoption granted or confirmed by a final and unappealable decision;
  • ties of effective connection to the Portuguese community, assessed according to Art. 6(1)(c) to (i) (such as knowledge of the Portuguese language and culture and the absence of certain convictions or of a threat to national security);
  • not having held public office of a not predominantly technical nature nor performed non-compulsory military service for a foreign State.
Does an adoption granted in Brazil need to be reviewed in Portugal?

Yes, as a rule. If the adoption judgment was issued by a foreign court, it can only be relied on for citizenship purposes after being reviewed and confirmed by a Portuguese court, in proceedings for the review and confirmation of a foreign judgment (Arts. 978 et seq. of the Code of Civil Procedure). The exception is a decision issued in a country with which there is an agreement waiving such review.

Which documents are requested when the adoptee was born abroad?
  • birth certificate of the adoptee, legalized and translated if necessary;
  • birth certificate of the Portuguese adoptive parent (can be obtained ex officio);
  • certificate of the adoption decision, reviewed and confirmed if foreign;
  • evidence of effective connection to the Portuguese community.

If the adoptee is over 16, criminal record certificates are added and, where applicable, documents on public office held or military service performed for a foreign State.

And if the adoptee was born in Portugal?

In that case, the list is shorter:

  • birth registration certificate of the Portuguese adoptive parent, a full copy, which can be obtained ex officio by the registry services;
  • certificate of the decision that granted the adoption, for annotation on the adoptee's birth record.

As a rule, the court that grants the adoption sends a certificate ex officio to the competent Registry Office.

Contact

Talk to our team

Tell us about your case: we will reply by email and, if you prefer, schedule a video call.

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