Digital Contracts and Electronic Signature in Portugal

Introduction

Business digitalization has made digital contracts and electronic signatures essential tools. This guide explains the legal framework in Portugal and the European Union.

Legal Framework

eIDAS Regulation

Regulation (EU) No. 910/2014 (eIDAS) establishes the legal framework for:

• Electronic identification
• Trust services
• Electronic signatures

Portuguese Legislation

• DL 290-D/99 (electronic documents)
• Law 96/2015 (adaptation to eIDAS)
• Civil Code (contract validity)

Types of Electronic Signature

1. Simple Electronic Signature

• Any electronic data associated with other data
• Example: typed name, "I Accept" checkbox
• Evidentiary value: limited

2. Advanced Electronic Signature

• Uniquely linked to the signatory
• Allows identification of the signatory
• Detects subsequent alterations
• Example: DocuSign, Adobe Sign

3. Qualified Electronic Signature

• Created by qualified device
• Based on qualified certificate
• Legal equivalent to handwritten signature
• Example: Digital Mobile Key, Citizen Card

Validity of Digital Contracts

General Principle

Contracts concluded by electronic means are valid, provided that:

• There is agreement of the parties
• The object is lawful
• No special form is required

Contracts Requiring Special Form

• Real estate purchase and sale (public deed)
• Wills
• Real estate donations
• Fixed-term employment contracts (written form)

Best Practices

For Companies

1. Choose the appropriate type - Qualified signature for important contracts
2. Secure archiving - Keep contracts with proof of signature
3. Identify the parties - Verify signatories' identity
4. Timestamps - Use time stamps for date proof

For Consumers

1. Read before signing - Even digitally
2. Keep copies - Always request a copy of the contract
3. Verify the company - Confirm the seller's legitimacy

Tools Available in Portugal

Conclusion

Digital contracts are fully valid in Portugal when they meet legal requirements. The choice of signature type should match the importance and nature of the document.