Spanish Dual Citizenship in the U.S. — 2026 Guide

Two things dominate Spanish nationality work in the United States right now. The first is the democratic memory law, whose application window closed on 22 October 2025 — consulates are still processing files lodged in time, but no new requests are accepted. The second is a trap that costs people their nationality: the three-year declaration after naturalising as an American.

Quick facts

A Spaniard who acquires U.S. citizenship has three years to declare their wish to keep Spanish nationality before a consulate. Miss it and the nationality can be lost, which is a far more common outcome than people expect.

Routes and their status

Anyone who requested an appointment under the memory law before the cut-off must produce the proof of that request alongside the file. Without it the application is not accepted.

How the memory law files are finishing

1. Applicants who registered in time received credentials to choose a date at their consulate.
2. Those appointments are single and not reschedulable, so missing one is costly.
3. The file must include the proof that the appointment was requested within the deadline.
4. Documents need valid apostilles, generally no more than two years old, and sworn translations where they are not in Spanish.
5. Once granted, the nationality is entered in the consular civil registry.
6. The passport application follows, as a separate appointment.

Required documents

• Literal birth certificate of the ancestor who grounds the claim.
• Birth certificates linking each generation, apostilled and translated.
• Applicant’s passport, U.S. and of the country of birth where different.
• Photo identification and two proofs of address.
• Proof that the appointment was requested within the deadline, for memory law files.
• Evidence supporting the specific annex or route relied on.

Where to apply

Only at the consulate covering your U.S. address, which is also the office that will register the nationality once granted.

Additional notes

The three-year clock

The retention declaration is quick and cheap, and it is the single most valuable thing a Spaniard about to naturalise here can put in the diary.

Apostille freshness

Consulates apply age limits to apostilles in nationality files, commonly two years and sometimes one for documents from particular countries. Order them in the right sequence.

One person, one appointment

Appointments are personal and cannot be booked by third parties or agencies on your behalf.

Registration comes first

Nationality granted abroad takes effect once it is entered in the consular civil registry. Everything else, including the passport, waits on that entry.