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How can I sign a Power of Attorney using the Digital Mobile Key (Chave Móvel Digital)?

This article describes the process of adding a digital signature to a Power of Attorney using the Digital Mobile Key (Chave Móvel Digital) and the Citizen Card. This method is valid and secure, avoiding the need for additional procedures.

1. Access the Portal
Go to: https://www.autenticacao.gov.pt

2. Log In
Click on “Authenticate”.
Choose the option “Chave Móvel Digital”.

3. Enter Your Details
Insert your mobile phone number and the Digital Mobile Key PIN.
Confirm the code sent via SMS to your phone.

4. Sign Documents
Go to the “Document Signing” section.
Upload the Power of Attorney attached to this email.
Follow the instructions to apply your digital signature.

5. Complete the Signature
Check that all details are correct and finish the process.

Advantages of Digital Signature

  • Legal Validity: The digital signature via Chave Móvel Digital is legally valid in Portugal.

  • Speed and Convenience: Avoids the need for travel and reduces processing time.

  • Security: Ensures the authenticity and integrity of the document.