Declaration of Separate Property Spain (Declaración de Bien Propio)

A Declaration of Separate Property Spain (Declaración de Bien Propio) is a formal written statement by one spouse, governed by Article 1324 of the Código Civil (Real Decreto de 24 de julio de 1889), asserting that a specific asset — whether real property, a bank account, a vehicle, shares, or other valuables — belongs exclusively to that spouse's private patrimony (bienes privativos) and does not form part of the joint marital estate (sociedad de gananciales). Under the default matrimonial property regime in Spain, the sociedad de gananciales established by Articles 1344 through 1410 of the Código Civil provides that all assets acquired during the marriage through onerous title are jointly owned by both spouses. The Declaration of Separate Property carves an exception from this presumption by evidencing the private origin or private character of a specific asset.

The legal basis for this declaration is found in Article 1324 of the Código Civil, which establishes that a spouse may assert the private character of an asset in their sole possession if the other spouse acknowledges it or if the asset's private origin is proven. The Tribunal Supremo — Spain's highest civil court — has repeatedly recognised in its jurisprudencia that a formal declaration, particularly one executed before a Notario Público (Notary Public) or supported by documentary evidence of private origin, carries significant evidentiary weight in matrimonial property disputes before the Juzgado de Primera Instancia.

The primary distinction in Spanish matrimonial property law is between bienes privativos (private assets) and bienes gananciales (community assets). Private assets under Article 1346 of the Código Civil include assets owned before the marriage, assets received by gift (donación) or inheritance (herencia) during the marriage, assets acquired with private funds, and assets expressly designated as private in capitulaciones matrimoniales (prenuptial or postnuptial agreements) registered in the Registro Civil. Community assets under Article 1347 include all assets acquired for valuable consideration during the marriage and all income and returns generated by either spouse during the marriage.

The Declaration of Separate Property is particularly important in Spain because the presumption under Article 1361 of the Código Civil is that all assets of the spouses are community assets unless proven otherwise. Without a formal declaration backed by supporting evidence — such as a deed of purchase (escritura de compraventa) showing the funds came from a pre-marital account, a bank transfer showing the source as a pre-marital savings account, a certificate of inheritance (certificado de aceptación de herencia) from the Notario, or a gift deed (escritura de donación) — assets may be incorrectly classified as community property in dissolution proceedings before the Juzgado de Primera Instancia.

Under Spanish family law, formal classification of assets becomes critical during separation (separación), divorce (divorcio), or annulment (nulidad matrimonial) proceedings governed by Ley 15/2005 (which amended Articles 81 through 107 of the Código Civil), as well as in the liquidation of the sociedad de gananciales under Articles 1392 through 1410 of the Código Civil. A well-documented Declaration of Separate Property, supported by the Libro de Familia (Family Book) and relevant financial records, significantly reduces disputes before the Notario conducting the liquidation or the Juzgado de Primera Instancia handling a contested dissolution.

Autonomous community variations are important to note: in Cataluña, Aragón, Navarra, País Vasco, Galicia, and Islas Baleares, foral civil law (derecho foral civil) governs matrimonial property regimes instead of or alongside the Código Civil. In Cataluña, the default regime is separación de bienes under Codi Civil de Catalunya (Llei 25/2010), where all assets are presumed private — making this declaration less necessary but still useful as evidence of ownership origin. Spouses domiciled in these communities should verify the applicable foral regime before relying solely on the Código Civil framework.

A Declaration of Separate Property Spain is needed whenever a spouse in a sociedad de gananciales matrimonial regime wishes to formally document that a specific asset — real property, savings, investments, a vehicle, jewellery, or a business share — belongs exclusively to their private patrimony and not to the marital community.

The declaration is required when one spouse receives an inheritance (herencia) during the marriage. Under Article 1346.2 of the Código Civil, inherited assets are private; however, the Registro de la Propiedad (Land Registry) and financial institutions often require formal written confirmation — particularly when the inheritance includes real estate that the inheriting spouse wishes to sell, mortgage, or transfer without the other spouse's signature.

A Declaration of Separate Property is needed when a spouse uses pre-marital savings (ahorros privativos) to purchase an asset during the marriage. Without a declaration specifying the private origin of the funds and referencing the relevant bank account statements and the escritura de compraventa, the Registro de la Propiedad may register the asset as community property, creating complications in any future dissolution or individual sale.

The declaration is necessary when a spouse receives a gift (donación) from a parent or third party during the marriage. Under Article 1346.2 CC, gifts are private assets, but the Notario handling future transactions on the gifted asset may require documented proof — a copy of the escritura de donación combined with a Declaration of Separate Property provides this chain of title.

The document is needed when spouses anticipate matrimonial difficulties or are consulting with an abogado de familia (family law attorney) in preparation for a possible separation or divorce. Early documentation of private assets avoids the need for expensive expert accountancy proceedings (procedimientos de liquidación) before the Juzgado de Primera Instancia.

A Declaration of Separate Property is also needed in business contexts — when one spouse owns shares in a sociedad limitada or sociedad anónima that were acquired before the marriage or through a private inheritance, the company's Registro Mercantil records and bank account requirements may necessitate formal written confirmation that the shareholding is private and that the other spouse has no community interest in distributions or voting rights.

The declaration is useful when refinancing a mortgage on a privately owned property: Spanish mortgage lenders regulated by the Banco de España under Ley 5/2019 (Ley Reguladora de Contratos de Crédito Inmobiliario) frequently require documentation confirming whether a property is private or community-owned, affecting whether the non-owning spouse must consent to the transaction.

Under the Código Civil Articles 657–1087, Spanish succession law applies the legítima system (forced heirship). The Ley del Notariado governs testamentary forms (abierto, cerrado, ológrafo). The Impuesto sobre Sucesiones y Donaciones (ISD) Ley 29/1987 taxes inheritances. Foral regions (País Vasco, Navarra, Cataluña, Aragón, Baleares, Galicia) have distinct succession rules. The Reglamento UE 650/2012 governs cross-border EU successions.

A valid Declaration of Separate Property Spain under Article 1324 of the Código Civil must contain the following key elements to constitute admissible evidence of private asset status in proceedings before the Juzgado de Primera Instancia or the Notario conducting a sociedad de gananciales liquidation.

Identification of the Declaring Spouse: Full legal name, DNI (Documento Nacional de Identidad) or NIE (Número de Identidad de Extranjero) number, residential address, and marital status including the date and place of marriage registered in the Registro Civil. The declaration must be signed by the declaring spouse.

Identification of the Other Spouse: Full legal name and DNI/NIE of the non-declaring spouse. Under Article 1324 of the Código Civil, a spousal acknowledgement (reconocimiento del otro cónyuge) significantly strengthens the evidentiary value of the declaration — if the non-declaring spouse countersigns or provides a separate written acknowledgement, the declaration is far more difficult to challenge in dissolution proceedings.

Description of the Asset: A precise and unambiguous description of the asset claimed as private property. For real estate, this must include the Referencia Catastral (cadastral reference number assigned by the Dirección General del Catastro), the Registro de la Propiedad entry (finca number, volume, and folio), and the full address. For bank accounts, the IBAN and account title. For vehicles, the registration plate (matrícula) and chassis number. For company shares, the company name, NIF, and number of shares.

Basis of Private Character: The specific legal and factual basis for the private character of the asset, with reference to the applicable provision of Article 1346 of the Código Civil — pre-marital ownership, inheritance, gift, or acquisition with private funds. This section must reference the supporting documentary evidence: the deed of purchase, bank transfer records, certificate of inheritance, or gift deed.

Declaration Date Relative to Marriage: The declaration must confirm the date of marriage and the matrimonial property regime applicable (sociedad de gananciales or, where applicable, the relevant foral regime). Where the marriage is subject to capitulaciones matrimoniales registered in the Registro Civil or the Registro de la Propiedad, those must be referenced.

Evidentiary Attachments: While not always mandatory, attaching certified copies of the deed of acquisition (escritura de compraventa), bank transfer records, inheritance certificate (certificado de adjudicación de herencia), or gift deed (escritura de donación) issued by the Notario substantially strengthens the declaration before any tribunal or registry.

Notarial Authentication: Although not strictly required by Article 1324 CC for a private declaration, execution before a Notario Público under the Reglamento Notarial (Decreto de 2 de junio de 1944) and the subsequent protocolo notarial gives the declaration the status of documento público, which under Article 319 of the Ley de Enjuiciamiento Civil (LEC) — Ley 1/2000 — constitutes full evidence of its content and date against third parties, including creditors and the Registro de la Propiedad.

Governing Law Reference: A statement that the declaration is made under Spanish law, specifically the Código Civil (Royal Decree of 24 July 1889) and, where applicable, the relevant foral legislation of the autonomous community where the parties are domiciled.

Forms-legal.com provides this Declaration of Separate Property Spain template as a practical drafting tool. Every declaration affecting significant assets should be reviewed and formalised by a qualified Notario Público or abogado especialista en derecho de familia to confirm compliance with the Código Civil, the applicable autonomous community law, and the evidentiary requirements of the Registro de la Propiedad and financial institutions. The Consejo General del Notariado (www.notariado.org) maintains a directory of Notarios throughout Spain.

Under the Código Civil Articles 657–1087, Spanish succession law applies the legítima system (forced heirship). The Ley del Notariado governs testamentary forms (abierto, cerrado, ológrafo). The Impuesto sobre Sucesiones y Donaciones (ISD) Ley 29/1987 taxes inheritances. Foral regions (País Vasco, Navarra, Cataluña, Aragón, Baleares, Galicia) have distinct succession rules. The Reglamento UE 650/2012 governs cross-border EU successions.