If you’re living in Portugal, getting your Chave Móvel Digital (Digital Mobile Key) is an essential step for accessing government services online. This digital authentication method will save you countless hours that would otherwise be spent in queues at government offices. This guide will walk you through the entire process of obtaining your Chave Móvel Digital (CMD) for the first time.
What Is the Chave Móvel Digital?
The Chave Móvel Digital is Portugal’s digital authentication system that allows you to securely access various public services online. With this single authentication method, you can manage your taxes, social security, healthcare appointments, and many other government-related services without leaving your home. The CMD uses a multi-factor authentication process that always requires both a PIN (chosen by the holder) and an OTP (one-time password, temporary and automatically generated and randomly by the CMD system) to authenticate your identity.
Before You Begin
Before starting the registration process, make sure you have a valid mobile phone to receive verification codes, a working email address, a valid identification document (Citizen Card, Residence Permit, or Passport), and internet access.
Registration Options
There are four main ways to register for your Chave Móvel Digital:
Option 1: In-Person Registration (Recommended for First-Time Users)
This is the most straightforward option if you’re unfamiliar with the Portuguese digital system.
- Visit an authorized location – You can go to a Citizen Shop (Loja de Cidadão), Finance Service office (Serviços de Finanças), Civil Registry office (Conservatória do Registo Civil), or Social Security center (Centro de Segurança Social).
- Bring your identification – Portuguese citizens should bring their Citizen Card (Cartão de Cidadão), while foreign residents should bring their Residence Permit or Passport.
- Registration process – Inform the staff that you want to register for the Chave Móvel Digital. You’ll need to present your identification document, provide your mobile phone number and email address, create a PIN code (which you’ll need to remember), and you’ll receive an immediate confirmation SMS.
The entire process usually takes about 15-20 minutes, depending on how busy the office is.
Option 2: Mobile Registration with Citizen Card
If you’re a Portuguese citizen with a Citizen Card and a mobile phone, you can register through a mobile app:
- Required equipment – You’ll need a mobile phone with a camera and an app from Android, iOS, or Huawei installed (available at www.autenticacao.gov.pt).
- Registration steps – Follow the instructions on your app installed, have your citizen card ready, and create your PIN to activate your Chave Móvel Digital.
Option 3: Online Registration with Citizen Card
If you’re a Portuguese citizen with a Citizen Card and a smart card reader, you can register online:
- Required equipment – You’ll need a smart card reader connected to your computer and the updated Citizen Card software installed (available at www.autenticacao.gov.pt).
- Registration steps – Visit www.autenticacao.gov.pt and select “Ativar Chave Móvel Digital.” Insert your Citizen Card into the reader and enter your Citizen Card PIN when prompted. Then follow the on-screen instructions to provide your mobile number and email, and create a PIN.
Option 4: Registration via Video Call
This option became available more recently and is particularly useful if you cannot visit a physical location:
- Preparation – Book an appointment at www.autenticacao.gov.pt by selecting “Agendamento por Videochamada.” Have your identification document ready and ensure you have a device with a camera and microphone.
- During the video call – You’ll need to show your identification document, confirm your personal details, provide your mobile number and email, and create your PIN.

Using Your Chave Móvel Digital for the First Time
After registering, here’s how to use your Digital Key:
- Visit any compatible government service website (e.g., Portal das Finanças, Segurança Social Direta)
- Click on the login option for “Chave Móvel Digital”
- Enter your mobile number or email and the PIN you created
- You’ll receive a temporary code via SMS on your mobile phone
- Enter this temporary code on the website to complete your authentication
The temporary code is valid for a short period (usually a few minutes) and can only be used once.
Common Issues and Solutions
1. Did you forgot your PIN?
You can reset it through the Autenticação.gov.pt portal or by visiting any of the in-person service locations
2. Did you not receive the SMS code?
- Check if your phone has signal
- Verify that you provided the correct phone number during registration
- Wait a few minutes and try again
- If the problem persists, contact the helpline at 300 003 990
3. Did you change your phone number?
Visit an in-person service location with your ID to update your information.
Benefits of Using Chave Móvel Digital
Your Chave Móvel Digital provides access to over 200 public services online and eliminates the need to remember multiple usernames and passwords. It offers enhanced security for your personal data and saves significant time by avoiding in-person visits. You can also use it at private hospitals when you make appointments or interface with kiosks in the reception areas. The digital key is typically valid for 3 years, after which you’ll need to renew it.
Final Tips
Keep your PIN secure and don’t share it with anyone. Make sure your email and phone number are always up to date. Consider installing the “Autenticação.gov.pt” mobile app on your preferred software for even easier access to services.
With your Chave Móvel Digital activated, you’ll be ready to navigate Portugal’s digital bureaucracy with ease. This small investment of time will save you countless hours in the future and give you immediate access to important services wherever you are.