The Cl@ve system is the most essential tool for any expat or resident in Spain. It acts as your digital identity, allowing you to sign documents, check your medical history, and file taxes from your sofa.
In 2026, the system has evolved into two tiers: Basic and Advanced. While the “Invitation Letter” method is the classic way to start, the Tax Agency now offers faster digital alternatives. This guide will show you exactly how to register in Cl@ve using the method that suits you best.
Which registration level do you need?
Before you start, it is important to know that not all registrations are equal.
- Basic Level: Obtained via the Invitation Letter (post) or automatic video identification. It allows you to use Cl@ve PIN and Cl@ve Móvil for most standard procedures.
- Advanced Level: Obtained via Digital Certificate, in-person visit, or video call with a public agent. This is required for high-security tasks like using the Cl@ve Signature (cloud-based signing).
Method 1: Register in Cl@ve via Invitation Letter (No Certificate)
If you don’t have a digital certificate yet, this is the most common starting point. It relies on a physical letter sent to your fiscal address.
Step 1: Request the Invitation Letter
- Go to the official Agencia Tributaria (Tax Agency) website and look for “Register in Cl@ve.”
- Enter your DNI or NIE.
- DNI: You’ll need the validity date.
- NIE: You’ll need the “Support Number” (found on your green card or TIE).
- Click “Continue” and select the option: “Yes, send me an invitation letter to my tax address.”
- Hacienda will mail a letter containing a 16-character Secure Verification Code (CSV). This usually takes 2 to 5 business days.
Step 2: Complete the registration
- Once the letter arrives, return to the “Register in Cl@ve” portal.
- Enter your DNI/NIE again, but this time select “I already have an invitation letter.”
- Enter the 16-character CSV from your letter.
- Provide your mobile phone number and email address.
- You will receive a welcome SMS. You are now registered at the Basic Level!
Method 2: The 2026 “Fast Track” (Video Identification)
If you have the Cl@ve APP on your smartphone, you can now skip the physical mail.
- How it works: The app uses your camera to scan your ID and record a short video of your face to verify your identity.
- The Result: If an AI verifies it, you get a Basic Level. If a public official reviews it later (usually within 24 hours), your account is upgraded to Advanced Level automatically.
- Pro Tip: As of 2026, this is the preferred method for tech-savvy expats who need access “now” rather than waiting for the postman.
Summary of Registration Methods
Why your mobile number matters
In the Cl@ve system, your mobile phone is your “security key.”
- One number per person: You cannot register two different people with the same phone number.
- SMS codes: Every time you log in, you will receive a code via SMS or a push notification in the app.
- Keep it updated: If you change your Spanish SIM card, you must update your Cl@ve profile immediately, or you will be locked out of the system.
Frequently Asked Questions (FAQs)
Can I register in Cl@ve with a foreign phone number?
While technically possible for some procedures, it is highly discouraged. Most Spanish administration systems are optimized for Spanish (+34) numbers. Using a foreign number often results in delayed or blocked SMS codes.
What happens if I move house before my invitation letter arrives?
The letter is sent to your “Domicilio Fiscal” (tax address) on file with Hacienda. If you have moved, you must update your address using Form 030 before requesting the letter, otherwise, it will be sent to your old home.
I am a minor. Can I register in Cl@ve?
Yes, but you must be accompanied by a parent or legal guardian at a physical Registry Office. You will need your DNI/NIE and the Family Book (Libro de Familia).
Getting your Cl@ve access sorted is the best investment you can make for your life in Spain. Once registered, you’ll find that many tasks that used to take a whole morning at a government office can now be finished in under five minutes.
If you need personalized assistance, at Entre Trámites we offer management and tax advisory services for freelancers and SMEs. You can contact us through this contact form for us to call you, or if you prefer, you can schedule a free consultation or write to us on WhatsApp.
