Loss of nationality — voluntary renunciation only (Art 8)

PT-XCT-01 is the loss-of-nationality route under Portuguese law. Its defining feature is its narrowness: as of the operative law (Lei 37/81 in the redação of Lei Orgânica 1/2026, in force from 19 May 2026), there is exactly one statutory ground on which a person who holds Portuguese nationality may lose it — Article 8: a voluntary declaration, by a person who is a national of another State, that he or she does not wish to be Portuguese (Art 8, Lei 37/81). This is renunciation, an act of the individual's own will. It is not a deprivation, not a sanction, and not an automatic consequence of any conduct.

Three negative propositions are as load-bearing for this route as the positive one, because they are the points at which fabrication or cross-jurisdiction contamination is most likely:

1. There is no automatic loss by operation of law. Portuguese nationality is not lost for prolonged residence abroad, for acquiring or holding a second nationality, for service in a foreign army, or for failing to maintain registration. Portugal is a settled dual-nationality State; holding another passport never, by itself, costs a person Portuguese nationality.
2. There is no criminal accessory-penalty loss. A proposal to add a perda de nacionalidade as an accessory penalty (pena acessória) to the Penal Code (proposed Código Penal Art 69-D) was struck down by the Tribunal Constitucional in preventive review — Acórdão n.º 1134/2025, Processo n.º 1384/2025, Plenário, 15-12-2025 (DR Série I n.º 1, 02-01-2026). It never entered into force; LO 1/2026 contains no Penal Code amendment. A naturalised Portuguese citizen convicted of terrorism does not lose nationality as a penalty.
3. Loss is conceptually distinct from opposition (oposição) and from fraud-based cancellation. Opposition (Art 9 / Art 10) prevents an acquisition by will from consolidating in the first place — it is treated as its own route, PT-XCT-02, and does not concern a person who already holds nationality. Fraud-based cancellation (governed by the consolidation regime of Art 12-B, route PT-NAT-12B-CONSOL) is the annulment of a defective acquisition, again not a "loss" of validly-held nationality. PT-XCT-01 covers only the deliberate shedding of validly-held nationality by a dual national.

Because the only loss mechanism is voluntary, the supranational backstops on involuntary loss — the European Convention on Nationality (ECN, CETS 166), to which Portugal is a full party, and the CJEU proportionality doctrine of Rottmann (C-135/08) and Tjebbes (C-221/17) — operate in Portuguese practice as theoretical safeguards rather than as live constraints. They are nonetheless documented here because they frame why the Portuguese loss regime is structured the way it is and because they are the EU-law floor that any future involuntary-loss proposal would have to clear.

This route is a "control / exception" layer rather than an applicant pathway in the ordinary sense: most people interact with PT-XCT-01 not to acquire anything but to understand whether and how Portuguese nationality can be lost — frequently in the context of a second country that, unlike Portugal, requires renunciation of prior nationality as a condition of its own naturalisation.

---

PT-XCT-01 is unusual among routes in that "eligibility" means eligibility to lose (renounce) nationality, not to acquire it. The Art 8 ground has two cumulative substantive conditions plus an implied treaty-derived floor:

1. The declarant currently holds Portuguese nationality. Renunciation presupposes a held nationality. (A person whose acquisition was opposed under Art 9 and never consolidated has nothing to renounce — that is PT-XCT-02 territory, not this route.)
2. The declarant is, at the time of declaration, a national of another State ("sendo nacionais de outro Estado"). This is the operative gate. A mono-national Portuguese citizen cannot validly renounce, because the State will not permit a declaration that produces statelessness. The second nationality must be actual and current, not merely an entitlement or an expectation (S-E1-10, S-E1-12).
3. The declaration must be of the will not to be Portuguese. It is an express, voluntary manifestation of will ("declarem que não querem ser portugueses"). It is not inferred from conduct, from emigration, or from the acquisition of the second nationality (S-E1-12).

No-statelessness floor (treaty-mandated, ECN Art 7(3) + 1961 Convention): even where the literal text is read narrowly, the renunciation cannot be given effect if it would leave the person stateless. Because Art 8 itself requires the declarant to already be "national of another State," the statute is self-limiting on this point; the treaty floor is the belt-and-braces guarantee (PT-ASSERT-XCT-008).

Who is NOT within this route (negative eligibility):

• Long-term emigrants and diaspora Portuguese — they retain nationality indefinitely; mere residence abroad is irrelevant to Art 8.
• Dual nationals who simply hold a second passport — holding it is not renouncing; nothing is lost unless and until they declare.
• Persons convicted of crimes, including the most serious — no penal loss exists (TC Ac. 1134/2025).
• Persons whose acquisition is challenged for fraud (→ Art 12-B consolidation regime, PT-NAT-12B-CONSOL) or opposed for lack of effective links before consolidation (→ Art 9/10, PT-XCT-02).
• Children who would be rendered stateless — the no-statelessness floor blocks it.

---

Substantive requirements for an effective Art 8 renunciation:

• The declaration is made to the Instituto dos Registos e do Notariado (IRN) / Conservatória dos Registos Centrais (CRC), the single national authority for nationality acts.
• Evidence of the foreign nationality (e.g., a valid foreign passport or nationality certificate) is required so that the registrar can confirm the no-statelessness condition.
• Identity documentation and the registration of the loss in the Registo Nacional de Pessoas (RNP) / civil registry.
• For a minor or person lacking capacity, the ordinary representation rules apply; a representative cannot use Art 8 to render a ward stateless.

Effects timing (Art 11 / Art 12 distinction): loss takes effect from the registration of the declaration; it is not retroactive to birth. This mirrors the general rule that attribution (originária) produces effects ex tunc (Art 11) while events of acquisition or loss operate from the date of the relevant act/registration (Art 12) (PT-ASSERT-DSC-013, cross-referenced).

---

Single national authority. Nationality is the exclusive non-delegable competence of the Assembleia da República (CRP Art 164 f), exercised only by organic law (Art 166 n.2). The Azores and Madeira confer no separate nationality and apply no different rules (CRP Art 225 n.3 — regional autonomy does not affect State sovereignty). There is one national register — the Registo Nacional / Conservatória dos Registos Centrais (CRC) within the IRN (PT-ASSERT-XCT-010; S-A2-01, S-A2-02).

Steps for a voluntary renunciation (Art 8):

1. Confirm the second nationality. The declarant must already hold another nationality and be able to evidence it. If they do not, Art 8 is unavailable (statelessness floor).
2. File the declaration with the IRN / CRC. An express declaration of the will not to be Portuguese, with proof of foreign nationality and identity.
3. Registrar review and registration. The registrar confirms the no-statelessness condition and registers the loss in the RNP / civil registry. Loss takes effect from registration (Art 12 timing).
4. Effects. The person ceases to be Portuguese (and, derivatively, ceases to be an EU citizen via Portugal). Reacquisition later is possible by declaration under Art 4 (route PT-RST-01) — there is no statutory residence requirement mandated for reacquisition.

Authorities and appeals:

• Instituto dos Registos e do Notariado (IRN) / Conservatória dos Registos Centrais (CRC): receives and registers the declaration.
• Ministério da Justiça: supervisory ministry.
• Ministério Público (MP): has a role in the adjacent opposition layer (Art 9/10, PT-XCT-02) but not in voluntary renunciation.
• Appeals: judicial review of nationality-registry decisions routes to the administrative courts, with apex at the Supremo Tribunal Administrativo (STA) — confirmed since the LO 2/2006 modernisation. This is not a civil-court / Supremo Tribunal de Justiça (STJ) matter (PT-ASSERT-XCT-010; STA Proc. 0219/10.6BEPRT, 14-02-2019, confirms the executive may not read unlegislated conditions into the nationality law — the reserva-absoluta principle, S-A2-20, S-E1-25).
• Tribunal Constitucional: the apex constitutional check, exercised in preventive review of the reform (Ac. 1133/2025 and Ac. 1134/2025).

A reverse-direction note for foreign processes: Portuguese law neither requires nor encourages renunciation as a condition of holding another nationality. Where a second country requires an applicant to renounce a prior nationality to naturalise there, Art 8 is the Portuguese-side mechanism by which a Portuguese dual national would effect that renunciation. The Portuguese State does not initiate or compel it.

---

• Lei 37/81 Art 8 (loss / Perda da nacionalidade), in the redação of LO 1/2026: "Sem prejuízo do disposto na lei, perdem a nacionalidade portuguesa os que, sendo nacionais de outro Estado, declarem que não querem ser portugueses." — A person who, being a national of another State, declares that he does not wish to be Portuguese, loses Portuguese nationality (S-E1-10, S-E1-12).
• Constitutional basis: CRP Art 4 (citizenship defined by ordinary law / international convention); CRP Art 164 f) — acquisition, loss and reacquisition of Portuguese citizenship is the reserva absoluta (exclusive, non-delegable competence) of the Assembleia da República; CRP Art 166 n.2 — such laws take the form of lei orgânica. Loss grounds therefore cannot be created by regulation, by Penal Code amendment alone, or by administrative practice; only the AR, by organic law, may define them (S-A2-08, PT-ASSERT-XCT-010).
• Reacquisition counterpart: Art 4 (reacquisition) is the mirror of Art 8 — a person who renounced under Art 8 may later recover by declaration to the IRN/CRC (this is route PT-RST-01, cross-referenced; not re-litigated here).

What LO 1/2026 changed (and did not change) for loss

LO 1/2026 was a substantially restrictive reform of Portuguese nationality law (it raised naturalisation residence to 7 years for CPLP/EU nationals and 10 years for others, closed the Sephardic route, tightened conditional jus soli, and added the bisneto naturalisation track). Despite that restrictive character, the loss regime was left as a single voluntary-renunciation ground. The amended-articles list of LO 1/2026 touches Arts 1, 3, 5, 6, 8, 9, 10, 12-B, 12-C and the procedural articles, but the substance of the Art 8 loss ground — voluntary renunciation by a dual national — is confirmed unchanged (S-E1-11, S-E1-12).

The politically salient attempt to expand loss travelled on a separate track and was killed at constitutional review:

• The governing coalition advanced two parallel decrees: Decreto AR 17/XVII (later 48/XVII) amending Lei 37/81 — which became LO 1/2026 — and Decreto AR 18/XVII (later 49/XVII) amending the Código Penal to add an accessory penalty of loss of nationality (proposed CP Art 69-D) for certain serious crimes committed by persons who had acquired (rather than original) Portuguese nationality.
• The President referred both to the Tribunal Constitucional for preventive (a priori) review.
• TC Ac. 1134/2025, Proc. 1384/2025, Plenário, 15-12-2025 (requerimento of 50 Deputados; DR Série I n.º 1, 02-01-2026) struck the proposed CP Art 69-D n.os 1, 2(a), 4, 5 and 6 on three independent grounds: breach of equality (CRP Art 13 — the penalty discriminated between original and acquired nationals, and between those <10y and >10y after acquisition); breach of proportionality / penal necessity (CRP Art 18 n.2 and Art 26 n.1 — a fixed loss penalty with no individual calibration); and breach of the culpa principle. The penal-loss route was therefore never enacted (S-A2-08, S-E1-14b).
• LO 1/2026, as promulgated and in force, contains no Penal Code amendment and no accessory-penalty loss. The forward-guard is explicit: do not import perda-pena-acessória language into any PT loss documentation (PT-VC-017; PT-ASSERT-XCT-002).

This sits inside the broader constitutional-review history of the reform: TC Ac. 1133/2025, Proc. 1383/2025, Plenário, 15-12-2025 (DR Série I n.º 2, 05-01-2026) struck four norms of the companion Lei-37/81 decree (the ≥2-year criminal-conviction bar; the vague conduct-based opposition ground; the Art 12-B(3) "manifesta fraude" clause; and the retroactive transitional rule). After a Presidential veto (19-12-2025), the bill was revised and re-enacted as LO 1/2026, with the criminal threshold corrected by Declaração de Retificação 17/2026 to "pena de prisão efetiva superior a 3 anos." None of those four struck norms concerned the Art 8 loss ground (PT-ASSERT-XCT-009; S-A2-05, S-A2-07).

Treaty / supranational frame

• ECN (CETS 166): Portugal is a full party (signed 06-11-1997; ratified 15-10-2001; EIF 01-02-2002; RAR 19/2000 + DPR 7/2000 + Aviso 120/2001; no reservations) (S-E1-03, S-E1-04, S-E1-05). ECN Art 7 sets the exhaustive list of permissible ex lege (involuntary) loss grounds; Art 7(3) prohibits any loss or renunciation that would render the person stateless; Art 4(c) prohibits arbitrary deprivation; Art 16 limits requiring renunciation of a former nationality. Portugal's Art 8 voluntary-renunciation framework, conditioned on the person already being a national of another State, is ECN-compliant by construction (PT-ASSERT-XCT-008).

• EU-law backstop: Rottmann (C-135/08, 02-03-2010) and Tjebbes (C-221/17, 12-03-2019) require an individual proportionality review where loss of a Member State's nationality causes loss of EU citizenship — Tjebbes extending the requirement even to automatic loss by operation of law, with possible ex tunc recovery. Because Portugal's only loss ground is voluntary renunciation (which the person chooses, while holding another nationality), these doctrines are a theoretical backstop in Portuguese practice; no Portuguese court has been observed applying Tjebbes to a specific Portuguese loss case (PT-ASSERT-XCT-006).

---