Adoption by declaration — pre-1981 historical route (Art 29 former code) [SUPERSEDED]

PT-ADP-02 captures the historical adoption-based nationality conferral mechanism that existed under the pre-1981 Portuguese nationality code (Lei 2098/1959). Under that former regime, adoption by a Portuguese national could confer Portuguese nationality on the adoptee through a declaration mechanism codified in Art 29 of the former code.

The entire pre-1981 nationality framework was superseded on 3 October 1981 when Lei 37/81, de 3 de outubro, entered into force. Lei 37/81 established the modern Portuguese nationality structure that continues — in amended form — to the present day (as republished by Lei Orgânica 1/2026, DR 95/2026 Série I, 18-05-2026; EIF 19-05-2026).

This route is relevant today only in the narrow context of establishing nationality rights for persons who were adopted under the former code before 3 October 1981 and have not yet formalised their status in the Portuguese civil registry. It is not a route available for new adoptions.

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This route is closed to new applications. No new eligibility criteria apply.

For historical documentation purposes only, the former Art 29 regime covered persons who:

1. Were adopted (in the legal sense recognised by Portuguese civil law at the time) by a Portuguese national;
2. Completed that adoption before 3 October 1981 (the EIF of Lei 37/81); and
3. Filed or were recorded in the Portuguese civil registry under the former nationality framework.

Persons who were validly adopted by a Portuguese national before 1981 and acquired Portuguese nationality under Art 29 at that time retain any nationality so acquired (subject to the general rules on loss, which under current law — Lei 37/81 Art 8 — require only voluntary renunciation). Their status is governed by the acquisition as it existed at the historical moment, not by any subsequent amendment.

The children of persons who acquired nationality via the former Art 29 mechanism may be entitled to Portuguese nationality under the general jus sanguinis chain of Lei 37/81 Art 1(1)(a)-(c) (PT-DSC-01), subject to verification that their parent's nationality was validly acquired and has not been lost.

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There is no fresh application process under the former code. A person claiming nationality on the basis of a pre-1981 adoption under Art 29 must demonstrate their status to the Conservatória dos Registos Centrais (CRC) through the current civil registry system. The relevant requirements are evidentiary:

1. Documentary proof of the pre-1981 adoption — a formal adoption decree (sentença de adopção) or equivalent civil registry record pre-dating 3 October 1981, issued by a Portuguese competent court or authority under the law then in force.
2. Identity of the adopting Portuguese national — evidence (birth certificate, civil registry entry, or passport) confirming the adopter held Portuguese nationality at the time of the adoption.
3. Applicant's identity documents — current passport or identification document.
4. Any civil registry inscription showing the adoptee's status in the Portuguese Registo Nacional de Pessoas (RNP) or equivalent archive.

: The precise documentary requirements and procedural pathway for confirming nationality under a pre-1981 adoption have not been independently retrieved at T1 level. An applicant in this situation should consult the IRN/CRC directly and, if necessary, seek legal advice on the applicable transitional recognition procedure.

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For any historical claim arising from a pre-1981 adoption:

Primary authority: Conservatória dos Registos Centrais (CRC), IRN — Rua Rodrigo da Fonseca 198, 1099-043 Lisboa; online: irn.justica.gov.pt. The CRC maintains the Registo Nacional de Pessoas (RNP) and is the competent authority for civil registry entries confirming nationality status.

Appeals: Administrative courts / Supremo Tribunal Administrativo (STA). Appeals in nationality matters have gone to the administrative courts since LO 2/2006 (not the STJ, which had jurisdiction pre-2006).

Process: There is no standard form for a "pre-1981 adoption nationality claim" as a discrete procedure. The applicant would present their historical documentation to the CRC and request recognition of Portuguese nationality status or issuance of a certificate of Portuguese nationality. The CRC will assess the evidence under the applicable historical law.

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The pre-1981 Portuguese nationality regime was governed by Lei 2098/1959. Art 29 of the former nationality code provided a mechanism by which persons adopted by Portuguese nationals could acquire Portuguese nationality by declaration.

The applicable law for any historical claim is the version of the nationality code in force at the time the adoption occurred — prior to 3 October 1981. Lei 37/81 superseded the entire former code on that date. There is no transitional provision in Lei 37/81 that extends the former Art 29 mechanism forward; the transition was a clean substitution of the entire legal framework.

The current consolidated text of Lei 37/81 (13th version, LO 1/2026 republication) does not contain any reference to Art 29 of the former code; that article has no continuing operative force. The arts 30 and 31 of Lei 37/81 address specific historical continuity matters for certain pre-1981 situations (married women's nationality — see PT-RST-02-W1) but do not extend Art 29 of the former code.

Substantive legal basis (historical):

• Lei 2098/1959 (former nationality code, full text not retrieved at T1 — )
• Art 29 former code (adoption mechanism — T3 reference only; primary text not independently confirmed)

Superseding instrument:

• Lei 37/81, de 3 de outubro — Art 5 (adoption mechanism, as it existed at founding; subsequently amended, most recently by LO 1/2026)

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