Zenoo
eID scheme ● Integrated

Cartão de Cidadão

Portugal

The Cartão de Cidadão is Portugal's citizen card, the primary national identity document for Portuguese citizens. It is a multipurpose chip-based card that replaced several separate documents, and it supports strong online authentication and qualified electronic signatures for access to public and private digital services.

Scheme facts
Issuing authority Portuguese state, as the national citizen card for Portuguese citizens
Country Portugal
Identifier Civil identification number (número de identificação civil), the citizen's core identifier on the card
Data returned Verified name, date of birth, and confirmation of the civil identification number
Coverage Issued to Portuguese citizens as the primary national ID and used for online authentication and signing
Official status Official national electronic ID that complies with the eIDAS Regulation at a high assurance level
What is itHow verification worksWhat you can buildPairs well withFAQ

What is Cartão de Cidadão?

The Cartão de Cidadão is Portugal's citizen card, the primary national identity document for Portuguese citizens. It is a multipurpose chip-based card that replaced several separate documents, and it supports strong online authentication and qualified electronic signatures for access to public and private digital services.

Verification uses the certificates held on the card's chip. The person presents the card to a reader and enters their authentication PIN, and the scheme confirms the identity linked to the card and can return verified details such as the person's name and date of birth. The card carries the citizen's civil identification number as its core identifier. The customer proves who they are directly with their existing card and PIN, so there is no document upload or selfie step.

How verification works

Person authenticates with the Cartão de Cidadão

The customer presents their citizen card to a card reader and enters their authentication PIN to prove who they are using the certificates on the chip.

Verified identity confirmed

The scheme confirms the identity linked to the civil identification number and returns verified details such as name and date of birth.

Signals returned to your flow

Once the connector is activated, a verified result, the confirmed identity details, and a full audit record flow straight into your Zenoo case.

What you can build

Open a bank account with a verified citizen card login instead of a document upload.
Onboard new customers for digital e-KYC with a trusted national credential.
Confirm a lending applicant's identity before you extend credit.
Sign agreements and mandates digitally with a qualified electronic signature.
Give verified access to Portuguese public and private online services.

Pairs well with

Chain these into one Zenoo Studio flow so a single journey handles identity, screening, and fraud.

Coverage context

One of 209 countries, 16 indicators each

Cartão de Cidadão is one scheme in Zenoo's global coverage. Add a neighbouring register or a document fallback without changing your integration.

Chave Móvel Digital (Portugal)Carta d'Identità Elettronica (Italy)Belgian eID card

Frequently asked questions

How do I verify a Cartão de Cidadão identity?

The person authenticates with their citizen card by presenting it to a card reader and entering their authentication PIN. The scheme confirms the identity linked to their civil identification number and returns verified details such as name and date of birth to your service.

What data does the Cartão de Cidadão return?

On a successful authentication the scheme can return the person's verified name and date of birth, along with confirmation of their civil identification number. There is no document upload or selfie step, because the person proves identity with their existing card and PIN.

Is the Cartão de Cidadão mandatory in Portugal?

The Cartão de Cidadão is the primary national identity document for Portuguese citizens, but using its online authentication for a given private-sector service is not compulsory. It is a widely recognised way for Portuguese citizens to prove who they are online.

How does Cartão de Cidadão verification work with Zenoo?

You can activate this connector with your own account. Zenoo's AI builds the integration, typically within a day. The person then authenticates with their Cartão de Cidadão and Zenoo returns a verified result with a full audit trail.

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