The Supreme Court of Spain has determined that inheritance rights accepted by a person automatically become part of their estate, even if the assets have not been formally distributed. This applies regardless of whether the assets have been partitioned or liquidated, according to the court’s Sala de lo Civil in its Sentencia 1318/2026, released on July 24, 2026.
The dispute originated from a long-running conflict between three siblings and a third-party beneficiary named in their mother’s will. The mother had inherited a portion of her husband’s estate in 1977 but never formally partitioned the assets. Instead, she and her husband operated under a society of gains arrangement, allowing her to use the inherited property and its income for decades without settling the estate.
Upon her death in 2013, her will designated one-third of her own estate, assets originally inherited, to a stranger, while the remaining two-thirds were divided equally among her three children. The siblings then sought to dissolve the society of gains and distribute their parents’ estate, but they excluded the third-party beneficiary from the process. The beneficiary contested this exclusion, arguing that the third of the estate their mother had received from her husband should have been included in her final estate.
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The Supreme Court ruled in favor of the beneficiary. The decision states that accepting inheritance rights, even implicitly, means those rights become part of the beneficiary’s estate. The court pointed to the mother’s long-term use of the property’s income as proof of acceptance. “The critical factor is not formal adjudication but the clear act of accepting the rights,” the ruling states. “An inheritance that remains pending is not one that does not exist.”
This principle holds even when an estate remains undivided. The court stressed that unresolved partitions do not negate preexisting rights. If a beneficiary accepts an inheritance, those rights are incorporated into their estate and subject to their will, regardless of whether the original assets were ever formally assigned.
The ruling also reinforces the legal standing of third-party beneficiaries. They now have the right to demand inclusion in estate liquidation and can challenge exclusions that may constitute fraud against their interests. The court cautioned that deliberate omissions could lead to the annulment of partitions to safeguard the beneficiary’s claims.
