Nationality by origin — foundlings

Overview. ES-BTH-03 is the route to Spanish nationality by origin for foundlings — children found in Spain whose filiation (parentage) cannot be determined. The route is active.

Spanish nationality is acquired, conserved, and lost in accordance with the law, as established by Article 11.1 of the Constitución Española of 1978. The nationality framework itself is set out in the Código Civil, Articles 17 to 26 (Título Primero, Libro Primero: De la nacionalidad). Within that framework, those who are Spanish by origin include not only persons born to a Spanish parent, but also persons born in Spain to foreign parents where at least one of those parents was also born in Spain, persons born in Spain to stateless parents or whose parents' law fails to attribute any nationality, and foundlings in Spain whose filiation is not determined. This route covers the last of these categories.

The governing provision is the Código Civil, Article 17, and specifically Article 17.1.d, which attributes Spanish nationality of origin to children found within Spanish territory where their parentage is unknown. This serves as a safeguard against statelessness: it operates alongside the Article 17.1.c statelessness fallback to give effect domestically to the child's right to a nationality under Article 7 of the 1989 Convention on the Rights of the Child, which Spain has ratified.

Because nationality is recognised by origin, acquisition is immediate rather than the product of a residence-based naturalisation, and the documentation burden is minimal. The competent authority for the route is the Registro Civil (Civil Registry).