The 12bis declaration is the route to Belgian nationality by declaration at the commune of residence: dossier is filed with the officier de l’état civil, who issues a receipt, transmits the file to the public prosecutor (parquet), and registers the declaration on a positive (or silent) opinion within four monthsDocumentation Index
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[code-nationalite-12bis] [spf-justice-declaration-nationalite]. The skill stops at receipt issuance and registration of the declaration. The Crown’s decision on naturalisation under art. 19, the parquet’s negative opinion procedure, appeals, and oath-taking are out of scope.
Statutory basis
Acquisition by declaration is governed by article 12bis of the Code de la nationalité belge (Loi du 28 juin 1984, NUMAC 1984062835)[code-nationalite-12bis]. Article 12bis §1 sets out five sub-categories (numbered 1° to 5°) under which an adult may declare; §3 sets the declaration formality (the sworn statement of allegiance to the Constitution, the laws and the European Convention on Human Rights); §4 sets procedural detail. Article 12bis §2 was abrogated by the reform of 4 December 2012 and is no longer a route.
Other nationality routes — art. 11 (by birth), art. 11bis (transmitted from a Belgian parent), art. 12 (by adoption), art. 19 (naturalisation by the Chamber) — are out of scope for this skill.
Routing — which sub-category of art. 12bis §1 applies
Walk the five sub-categories in declaration order. When more than one applies, prefer the one with the lighter evidence burden; surface the alternatives once for awareness, then proceed with the lighter option unless the user objects (a user may have private reasons to prefer a heavier path — for example, not wanting marital status leveraged in the dossier).| Sub-category | Conditions (cumulative) | Headline documents beyond the common core |
|---|---|---|
| §1, 1° | Born in Belgium AND continuous legal residence in Belgium since birth | None beyond the common core — birth in Belgium is established by the Belgian birth certificate held by the commune |
| §1, 2° | 5 years uninterrupted legal residence AND knowledge of one national language (FR/NL/DE) AND social integration AND economic participation | Language proof + integration evidence + economic-participation evidence (468 working days as employee, or 6 quarters of self-employed contributions) [spf-justice-declaration-nationalite] |
| §1, 3° | 5 years uninterrupted legal residence AND knowledge of one national language AND social integration AND (married to a Belgian for 3 years cohabitation OR parent of a minor Belgian child) | Marriage certificate or Belgian-child birth certificate + composition de ménage + integration evidence (lighter than §1, 2°: 234 working days suffice when paired with 400-hour training) |
| §1, 4° | 5 years uninterrupted legal residence AND (recognised disability or invalidity OR statutory pension age) | Medical / pension attestation; no language, integration or economic-participation evidence required |
| §1, 5° | 10 years uninterrupted legal residence AND knowledge of one national language AND participation in the life of the host community | Language proof + a free-form participation evidence (associative, sociocultural, economic) — heavier than §1, 2° on residency but lighter on integration formalism |
Common-core documents (every sub-category)
| Document | Source | Notes |
|---|---|---|
| Birth certificate (originator’s home country, full copy with parents’ filiation) | Origin civil registry — see acquisition route below | Apostilled, EU 2016/1191 multilingual form, or consular-legalised depending on origin (see “Certification of foreign documents” below). Sworn translation to FR, NL or DE required unless the EU multilingual form covers the document type. Commune typically requires the extract to be ≤6 months old at filing — verify with the commune. [spf-justice-declaration-nationalite] |
| Identity card or residence permit (carte A, B, C, F, F+, K, L, etc.) | Commune-issued | Photocopy recto/verso certified conforme by the commune. |
| Certificate of residence with address history (certificat de résidence avec historique des adresses) | Commune-issued | Demonstrates the uninterrupted 5- or 10-year residence; the commune draws this from the population register. [spf-justice-declaration-nationalite] |
| Proof of payment of the federal registration fee (droit d’enregistrement) | User — paid to the regional Bureau de sécurité juridique or via www.myminfin.be before filing | The fee is statutory and federal; pay before filing and bring the proof of payment with the dossier [spf-justice-declaration-nationalite]. Treat as a volatile_value (federal_registration_fee_eur). |
Documents per sub-category — additional layer
§1, 1° — born in Belgium, continuous residence
No additional layer beyond the common core. The Belgian birth certificate is held by the commune of birth.§1, 2° — 5 years residence + integration + economic participation
Additional documents:- Language proof. One of: a Belgian secondary diploma in an official language; a higher-education diploma in an official language; a certified A2-level certificate from a recognised body; passing the integration parcours; or another route confirmed by the commune
[spf-justice-declaration-nationalite]. - Social integration evidence. One of: Belgian secondary or higher diploma; ≥400 hours of recognised professional training (VDAB, Bruxelles Formation, Forem, ADG); successful completion of the regional integration parcours (BAPA in Brussels-Capital, Parcours d’intégration in Wallonia, inburgering in Flanders, Eingliederungsparcours in the German-speaking community); or 5 uninterrupted years of employment
[spf-justice-declaration-nationalite]. - Economic participation evidence. Individual employment account showing ≥468 working days over the 5-year period (employee path); or attestation of self-employed affiliation plus 6 quarters of paid contributions to the social-insurance fund (self-employed path)
[spf-justice-declaration-nationalite].
§1, 3° — 5 years residence + spouse-of-Belgian or parent-of-Belgian-child
Additional documents:- Spouse path: Belgian acte de mariage (or foreign marriage certificate certified per the certification-route table below); certificate of cohabitation / composition de ménage showing 3 uninterrupted years under the same roof in Belgium with the Belgian spouse
[spf-justice-declaration-nationalite]. - Parent path: birth certificate of the minor Belgian child, establishing parentage and the child’s Belgian nationality
[spf-justice-declaration-nationalite]. - Language proof. Same options as §1, 2°.
- Social integration evidence. Lighter than §1, 2°: a Belgian diploma OR ≥400 hours of recognised professional training combined with ≥234 working days OR successful integration parcours
[spf-justice-declaration-nationalite].
§1, 4° — 5 years residence + disability, invalidity or pension age
Additional documents:- Medical attestation of recognised disability or invalidity issued under the relevant federal social-security regime (DG Personnes handicapées for disability; INAMI for invalidity); OR proof of having reached the statutory pension age
[spf-justice-declaration-nationalite].
§1, 5° — 10 years residence + language + community participation
Additional documents:- Language proof. Same options as §1, 2°.
- Participation in the life of the host community. Free-form evidence: long-standing employment in Belgium, voluntary or associative work, sociocultural engagement, civic participation. The commune assesses sufficiency; no fixed threshold
[spf-justice-declaration-nationalite]. Bring the most documented examples available.
Certification of foreign documents
Foreign public documents (birth certificate, marriage certificate, criminal-record extract from origin country) need a certification path before the commune accepts them. Three routes exist; the route depends on the document’s country of issue AND the document’s date of issue relative to that country’s accession to the Hague Apostille Convention.| Origin country class | Route | Sub-skill |
|---|---|---|
| EU/EEA member state | EU 2016/1191 multilingual standard form attached to the document; no apostille and no sworn translation required for covered document types (birth, marriage, criminal record, residence) [eu-2016-1191-public-documents] | eu-2016-1191-multilingual-form (in flight) |
| Hague Apostille party at the document’s date of issue | Apostille on the original (or on a fresh extract) [hcch-apostille-convention] | apostille-foreign-document-hague (in flight) |
| Non-Hague non-EU, OR Hague party but document issued before that country’s entry into force | Consular legalisation chain (origin foreign-affairs ministry → Belgian embassy / consulate in origin) | consular-legalisation-foreign-document (in flight) |
Process at the commune
- Identify the correct sub-category of art. 12bis §1. Walk the routing table; pick the lighter path when multiple apply; state the alternatives once and proceed.
- Assemble the common-core dossier and the per-sub-category layer. Confirm freshness windows on origin-country extracts; pull fresh ones if older than the commune’s threshold (typically ≤6 months; verify).
- Pay the federal registration fee to the regional Bureau de sécurité juridique (or via myminfin.be) before booking the appointment. Bring the proof of payment to the appointment — the file is not deemed complete without it
[spf-justice-declaration-nationalite]. Treat the amount as avolatile_value. - Book the appointment with the Service Population / Bevolkingsdienst of the commune of registered residence. Most communes operate a nationality desk by appointment only; lead times vary by commune (from a few weeks to several months). Treat the lead time as a
volatile_value. - Attend the appointment with the dossier. Make the declaration before the officier de l’état civil: the formal statement (per art. 12bis §3) is “Je déclare vouloir acquérir la nationalité belge et me soumettre à la Constitution, aux lois du peuple belge et à la Convention de sauvegarde des droits de l’homme et des libertés fondamentales” (or the NL/DE equivalent at communes operating in those languages)
[code-nationalite-12bis]. The declaration may be made orally if the user is unable to write[code-nationalite-12bis]. - Receipt (récépissé) issuance. If the file is complete and admissible, the commune issues a receipt within 35 days of filing. If the file is incomplete, the commune notifies missing pieces; the user has 2 months to complete; the commune then issues the receipt within 15 working days of complete-file confirmation, or refuses the file by registered post within 15 days of the 2-month deadline expiring
[spf-justice-declaration-nationalite]. Treat the windows asvolatile_values. - Parquet review. The commune transmits the file to the public prosecutor (parquet). The prosecutor has 4 months from the date of the receipt to issue an opinion. Silence at 4 months is deemed a positive opinion; on a positive (or silent) opinion the commune registers the declaration and the user becomes Belgian on the date of registration
[code-nationalite-12bis][spf-justice-declaration-nationalite]. A negative opinion is appealed to the Tribunal de la famille — out of scope for this skill.
Branching by region — language of the declaration and integration provider
The art. 12bis declaration is a federal procedure but is filed at the commune, which operates in the regional language(s):- Flemish Region commune — declaration filed in Dutch; integration evidence flows from inburgering (Flemish integration parcours) where applicable.
- Walloon Region commune (excluding the German-speaking communes) — declaration filed in French; integration evidence flows from the Parcours d’intégration (Wallonia).
- Brussels-Capital commune — bilingual (FR/NL); the user picks the language of correspondence and declaration; integration evidence flows from BAPA (Bureau d’accueil pour primo-arrivants).
- German-speaking community commune (Eupen, Sankt Vith and others) — declaration filed in German; integration evidence flows from the regional Eingliederungsparcours.
- Communes à facilités — the language of the commune’s working language applies; the user may receive procedural correspondence in the alternate language under the facilités regime.
bipl-integration-parcours, parcours-d-integration-wallonia, inburgering-flanders) — deferred to v1.1. This skill assumes the integration certificate exists when §1, 2° / §1, 3° / §1, 5° require it.
Branching by EU vs non-EU origin
EU/EEA-citizen applicants benefit from two carve-outs that affect document handling, not eligibility:- EU 2016/1191 multilingual form removes the apostille and sworn-translation requirements for covered document types (birth, marriage, criminal record, residence, name, parenthood, civil status, nationality, absence of criminal record) when the form is attached to the original document at issuance
[eu-2016-1191-public-documents]. Request the form from the issuing authority in the EU member state of origin. - Integration parcours exemption. EU citizens are not subject to the regional integration parcours obligation in any region (the parcours regimes target third-country nationals). For art. 12bis routes that require integration evidence (§1, 2° and §1, 3°), an EU citizen still needs to demonstrate integration via the alternative options (diploma, professional training, employment), not the parcours certificate.
Known surprises
- The five routes live under §1, not as five separate paragraphs. The pre-2012 statute had a different paragraph structure that older online guides (and some legacy citation patterns including
§1bis) still echo — the current statute is §1, 1° to §1, 5°; §2 is abrogated. Verify any external advice against[code-nationalite-12bis]. - Federal fee is paid before booking, not at the desk. The commune does not collect the federal registration fee directly — it is paid to the Bureau de sécurité juridique and the proof of payment is part of the dossier
[spf-justice-declaration-nationalite]. Treat the amount as avolatile_value(federal_registration_fee_eur). - Commune surcharge varies. Some communes levy a surcharge for nationality declarations on top of the federal fee — Schaerbeek charges €100
[schaerbeek-nationalite]; other Brussels and Wallonia communes charge €0–€30; some charge nothing. Treat as avolatile_value(commune_surcharge_eur_typical) and verify with the commune. - Origin-document freshness windows. Communes typically refuse foreign-issued birth certificates older than 6 months at filing, even when the document was authenticated years earlier for a previous procedure (carte F, marriage). Pull fresh extracts before booking.
- Senegal Hague accession 2023 cuts the certification route. A Senegalese birth certificate issued before 23 March 2023 takes consular legalisation; one issued on or after takes apostille. The same date sensitivity applies to other recent acceders
[hcch-apostille-convention]. - Working-days count under §1, 2° is statutory. 468 working days over the 5-year period for the employee path; 6 quarters of paid social-insurance contributions for the self-employed path. Lighter under §1, 3° (234 days when combined with 400h training). Treat thresholds as
volatile_valuesuntil further reform[spf-justice-declaration-nationalite]. - Parquet silence is positive. Four months without a parquet opinion is deemed favourable; the commune then registers the declaration. The user does not need to prompt the commune; they will be invited to collect the registration document
[code-nationalite-12bis]. - §1, 4° has no language requirement. Disability, invalidity and pension-age routes do not require language or integration evidence. Users in these categories often default-assume the §1, 2° conditions and over-prepare; reading the commune fiche corrects this.
- Acquisition does not strip origin nationality automatically. Belgium permits dual or multiple nationality; whether the origin country recognises the dual-nationality status is for the origin country to determine. Out of scope for this skill.
Verify with your commune
Before filing, confirm with the commune of registered residence:- Which sub-category of art. 12bis §1 the commune classifies the user under (the commune’s nationality officer reviews the routing).
- The commune-specific document checklist for that sub-category — communes vary on what proof of integration / economic participation they accept first-pass.
- The commune surcharge amount, if any, on top of the federal registration fee.
- The current appointment lead time and the booking channel (online portal, email, in-person).
- The freshness window the commune applies to foreign birth and criminal-record extracts (typically ≤6 months; verify).
- Whether sworn translations of foreign documents must be done by a translator on the federal register or whether the commune accepts a translator on a regional list.
- The language of the declaration (relevant in Brussels-Capital and in communes à facilités).
Verify with your commune before filing — procedures vary and change.
References
[code-nationalite-12bis]— Code de la nationalité belge, Loi du 28 juin 1984, art. 12bis (NUMAC 1984062835)[spf-justice-declaration-nationalite]— SPF Justice, Déclaration de nationalité / Nationaliteitsverklaring (federal procedural page)[hcch-apostille-convention]— Hague Convention of 5 October 1961 abolishing the requirement of legalisation for foreign public documents[eu-2016-1191-public-documents]— Regulation (EU) 2016/1191 on simplifying the presentation of certain public documents[schaerbeek-nationalite]— Schaerbeek commune procedure page (representative Brussels-Capital nationality desk)