This form of acquiring nationality is ex gratia and is not subject to the general rules
of administrative procedure.
The nationality by naturaization is granted, discretionally, through a Royal Decree by the Government, after examining the concurrence of exceptional circumstances.
In the event that you have acquired Spanish nationality by naturalisation card, you must:
-Swear or promise loyalty to the King and obedience to the Constitution and the laws.
-Declare that you renounce to your previous nationality, except if you have the nationality of any of the Ibero-American countries, Andorra, the Philippines, Equatorial Guinea or Portugal.