Entering the world of electronic signatures can feel overwhelming. Between legal acronyms, cryptographic jargon, and region-specific regulations, it’s easy to get lost. This comprehensive guide breaks down every essential term you need to know—whether you’re operating in the United States, the European Union, or Latin America.
Core Concepts: What Is an Electronic Signature?
Before diving into regional laws, let’s establish the fundamentals.
Electronic Signature (e-Signature)
An electronic signature is any electronic sound, symbol, or process attached to or logically associated with a record that is executed or adopted by a person with the intent to sign the record. This can be as simple as typing your name, drawing with a mouse, or clicking an “I Accept” button.
Digital Signature
A digital signature is a specific type of electronic signature that uses cryptographic techniques (like PKI) to provide stronger proof of identity and document integrity. All digital signatures are electronic signatures, but not all electronic signatures are digital signatures.
Wet Signature (Ink Signature)
The traditional, handwritten signature made with pen on paper. The term “wet” refers to the ink needing to dry.
🇺🇸 United States Terminology
The US has a mature legal framework for electronic signatures, dating back to the year 2000.
ESIGN Act (Electronic Signatures in Global and National Commerce Act)
Passed by Congress in 2000, the ESIGN Act is the federal law that grants electronic signatures the same legal validity as handwritten signatures for interstate and foreign commerce. It establishes that:
- A signature cannot be denied legal effect solely because it is electronic.
- A contract cannot be denied legal effect solely because an electronic signature was used.
- Electronic records satisfy any law requiring written records.
UETA (Uniform Electronic Transactions Act)
The UETA is a model state law that has been adopted by 49 of 50 states (all except New York, which has its own equivalent). UETA provides the procedural framework for how electronic signatures work at the state level, complementing the federal ESIGN Act.
Together, ESIGN and UETA form the legal backbone of e-signatures in the United States.
Notary Requirement Exceptions
Even under ESIGN, certain documents still require notarization or wet signatures in most US states:
- Wills and codicils
- Family law documents (divorce, adoption, custody)
- Court orders and pleadings
- UCC documents (depending on state)
- Real estate deeds (in some states)
🇪🇺 European Union Terminology
The EU has a more structured, tiered approach to electronic signatures.
eIDAS (Electronic Identification, Authentication and Trust Services)
Regulation (EU) No 910/2014, known as eIDAS, is the comprehensive European standard for electronic identification and trust services. Unlike ESIGN (a simple yes/no validity model), eIDAS creates three tiers of electronic signatures:
| Level | Name | Legal Effect | Technical Requirement |
|---|---|---|---|
| 1 | Standard Electronic Signature (SES) | Admissible as evidence | None (can be typed name) |
| 2 | Advanced Electronic Signature (AES) | Stronger presumption of authenticity | Unique to signer, tamper-evident |
| 3 | Qualified Electronic Signature (QES) | Equal to handwritten signature | Uses Qualified Trust Service Provider |
Qualified Electronic Signature (QES)
The highest level under eIDAS. A QES must be created using a Qualified Signature Creation Device (QSCD) and a certificate issued by a Qualified Trust Service Provider (QTSP). QES has the automatic legal equivalence of a handwritten signature across all EU member states.
Trust Service Provider (TSP)
An organization that provides trust services such as electronic signatures, seals, timestamps, and electronic delivery. A Qualified TSP (QTSP) is audited and placed on the EU Trusted List.
Electronic Seal (eSeal)
Similar to an electronic signature, but used by legal entities (companies) rather than individuals. An eSeal guarantees the origin and integrity of documents issued by an organization.
🌎 Latin America Terminology
Latin American countries have developed their own electronic signature frameworks, often inspired by both US and EU models.
Brazil (LGPD & ICP-Brasil)
- ICP-Brasil (Infraestrutura de Chaves Públicas Brasileira): Brazil’s Public Key Infrastructure, managed by the Instituto Nacional de Tecnologia da Informação (ITI). Digital signatures under ICP-Brasil have full legal validity.
- Medida Provisória 2.200-2/2001: The law establishing the legal validity of electronic signatures.
- e-CPF / e-CNPJ: Digital certificates for individuals (CPF) and companies (CNPJ) issued under ICP-Brasil.
Mexico (NOM-151 & Firma Electrónica Avanzada)
- Código de Comercio (Art. 89-94): Establishes the legal framework for electronic signatures in Mexico.
- NOM-151-SCFI: The official Mexican standard for message and document authenticity.
- Firma Electrónica Avanzada (FIEL/e.firma): Mexico’s advanced electronic signature, equivalent to eIDAS AES. Issued by the SAT (Servicio de Administración Tributaria) for tax purposes.
Argentina (Ley 25.506)
- Ley 25.506 (Ley de Firma Digital): Argentina’s Digital Signature Law (2001), which creates two categories:
- Firma Electrónica: Simple electronic signature (lower legal weight).
- Firma Digital: Uses certified digital certificates, equal to handwritten (stronger legal weight).
Colombia (Ley 527)
- Ley 527 de 1999: Establishes the legal equivalence of electronic messages and signatures.
- Entidades de Certificación: Certification entities authorized by the Superintendencia de Industria y Comercio to issue digital certificates.
Chile (Ley 19.799)
- Ley 19.799: Regulates electronic signatures and the accreditation of certification service providers.
- Firma Electrónica Simple (FES) and Firma Electrónica Avanzada (FEA): Two-tier system similar to eIDAS.
Technical Security Terminology
Regardless of your region, these technical terms are universal across all e-signature platforms.
PKI (Public Key Infrastructure)
A framework for managing digital certificates and public-key encryption. PKI binds a digital identity to a cryptographic key pair (public and private), ensuring that the person signing is who they claim to be.
Hash / SHA-256 Hashing
A cryptographic hash function creates a unique, fixed-length “fingerprint” of a document. SHA-256 (Secure Hash Algorithm 256-bit) is the industry standard.
If even a single pixel of the document changes after signing, the hash changes completely, instantly revealing tampering.
This is how WPsigner ensures tamper-proof document integrity.
Audit Trail
A detailed, immutable log of every action taken on a document:
- Who: IP address, email, user-agent (browser)
- When: Timestamp (ideally RFC 3161)
- What: Viewed, downloaded, signed, declined
A robust audit trail is essential for legal defensibility in disputes.
RFC 3161 Timestamping
An international standard (RFC 3161) for trusted timestamping. A Time Stamping Authority (TSA) issues a cryptographic proof that a specific document existed at a specific moment in time.
This prevents backdating and ensures long-term validity—even if the timestamp was created years ago.
Document Sealing
The process of cryptographically “locking” a document after all signatures are collected. A sealed document cannot be modified without invalidating the cryptographic hash, protecting all parties.
Frequently Confused Terms
| Often Confused | Actual Difference |
|---|---|
| E-Signature vs. Digital Signature | E-signature is the broad category; digital signature is a cryptographic subset. |
| Signing vs. Sealing | Signing = individual party affixes signature. Sealing = document locked after all sign. |
| Timestamp vs. Date Field | A trusted timestamp is cryptographic proof; a date field is user-editable text. |
| AES (eIDAS) vs. AES (Encryption) | Advanced Electronic Signature ≠ Advanced Encryption Standard. Same acronym, different meanings. |
Choosing the Right Level of Signature
| Use Case | Recommended Level | Why |
|---|---|---|
| Internal approvals, low-risk agreements | Standard e-signature (SES) | Fast, simple, sufficient for everyday use |
| Customer contracts, NDAs, employment offers | Advanced e-signature (AES) | Provides identity linking and tamper evidence |
| High-value transactions, regulated industries | Qualified e-signature (QES) | Legal equivalence guaranteed across EU |
Conclusion: Why Terminology Matters
Understanding these terms empowers you to:
- Choose the right e-signature level for your use case and jurisdiction.
- Ensure legal compliance whether you operate in the US, EU, or Latin America.
- Evaluate vendors critically—does your platform support audit trails, hashing, and timestamping?
WPsigner is designed to meet the requirements of ESIGN, UETA, and eIDAS out of the box. With SHA-256 hashing, RFC 3161 timestamping, and complete audit trails, you get a solution that’s not just convenient—but legally defensible across the globe. For more on data privacy regulations, read our guide on GDPR Compliance. For more on data privacy regulations, read our guide on GDPR Compliance.
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