Right of Transmission under Art. 1006 Spanish Civil Code: Supreme Court (STS 849/2026) Returns to the Classic Double-Transmission Doctrine
Spanish Supreme Court Judgment 849/2026 of 3 June makes a 180º turn and restores the classic theory of ius transmissionis: transmissaries inherit from the first deceased through the transmittent's estate, so both estates must be merged and the transmittent's widow must take part in the partition. Practical analysis, worked example and free download of the full judgment.
A judgment that reshapes the *ius transmissionis* once again
In its Judgment 849/2026 of 3 June, the Spanish Supreme Court has delivered a ruling with major practical impact on the right of transmission of Article 1006 of the Spanish Civil Code (the *ius transmissionis* or *ius delationis*). The First Chamber expressly returns to the classic double-transmission doctrine, correcting the line opened by its own judgment of 11 September 2013, which had been read as a single-transmission theory.
For those of us advising on international successions on the Costa Blanca (Torrevieja, Orihuela Costa, Moraira, Calpe), the judgment has immediate consequences for partition, forced heirship, the surviving spouse's statutory usufruct, Inheritance Tax and Land Registry practice.
> You can download the full STS 849/2026 at the bottom of this article.
1. The typical fact pattern (and the Supreme Court's own example)
The case is one constantly seen in practice, especially with elderly couples owning property in Spain:
- A dies, leaving as sole inheritance an apartment in Torrevieja (€100,000). B is the only child and heir.
- B dies shortly afterwards, without having accepted or renounced A's inheritance and without leaving a will. B owns a flat in Valencia (€100,000) and is survived by his wife D (68) and his son C.
- C accepts B's inheritance and, under Art. 1006 CC, "the right to accept A's inheritance is transmitted to him".
The key question is: does the widow D have any rights over the Torrevieja apartment (A's estate) or only over the Valencia flat (B's estate)?
2. The two competing theories
a) Modern *single-transmission* theory (STS 11-09-2013)
Under this view — followed by the CJEU and the DGRN for years — the transmissary (C) inherits directly from the first deceased (A), without passing through the transmittent's (B) estate. The transmittent's widow therefore does not participate in the first deceased's inheritance.