Cl@ve: advanced registration and activation of Cl@ve Permanente/Firma (Cl@ve: registro avanzado y activación de Cl@ve Permanente/Firma (Gestión 1))

What you need to have to hand

1. DNI or NIE in force. If you're a foreigner, also TIE and it's better to bring passport.
2. Spanish mobile (+34) with coverage to receive SMS.
3. Email address that you control.
4. Cita previa for Registro Cl@ve at an office that handles it (AEAT is usually the easiest).
5. If you have certificado FNMT or DNIe, you can skip the appointment: you can do everything online.

Documentation

• Documento identificativo original: DNI (Spaniards) or NIE/TIE + passport (non-EU foreigners).
• Justificante de cita previa (PDF or SMS) so they don't give you trouble at reception.
• Mobile number: they register it and you'll use it for every login/signature.
• Email address: they validate it; make sure it doesn't bounce.

Step by step

1. Check your status: go to https://clave.gob.es/clave_Home/registro.html and see if you're already in Cl@ve and which level. If you already have nivel avanzado, skip the appointment.
2. Book an appointment: at AEAT, go to https://sede.agenciatributaria.gob.es/Sede/cita-previa.html and choose the Registro Cl@ve procedure. If there are no slots in your city, try nearby offices.
3. In-person registration: on the appointment day, bring DNI/NIE/TIE. They'll verify your details, you'll sign the registration and they'll set you to nivel avanzado. It takes about 10 minutes if the system doesn't crash (it does sometimes).
4. Activate Cl@ve Permanente: go to https://clave.gob.es/clave_Home/clave-permanente.html, enter your details, get the SMS and create your password. You'll then have a stable login.
5. Activate Cl@ve Firma: at https://clave.gob.es/clave_Home/clave-firma.html. It will ask you to confirm with Cl@ve Permanente and an SMS. From here you can sign procedures that require it.
6. Technical test: install the Cl@ve PIN app (https://clave.gob.es/clave_Home/clave-pin.html) and log in to https://carpetaciudadana.gob.es or the AEAT Sede. Better to test before any deadline.

Tricks that save you time

• Renew your DNI/NIE if it's about to expire: if it expires, Cl@ve will throw weird errors.
• Appointments move: check early in the morning and in the afternoon; cancelled slots often appear.
• Chrome or Edge work better with Cl@ve. If you can't get in, clear cookies for clave.gob.es and try again.
• If you have certificado FNMT/DNIe, do the registro avanzado online and forget the counter; it's free and fast.
• Store your Cl@ve Permanente password in a password manager. If you forget it you'll waste time resetting it.

Common mistakes that can derail the procedure

1. Bringing a passport without NIE/TIE: they won't register you in Cl@ve if they can't find you by NIE.
2. Foreign phone number: without a Spanish mobile you won't get SMS and you'll be stranded.
3. Going without an appointment: many offices won't let you in. Book an appointment, always.
4. Capricious browser: Safari/Firefox sometimes fail the activation steps; switch to Chrome/Edge.
5. Changing mobile and forgetting it: if you lose the registered number you won't receive codes. Update your details before losing the line.