# Verdana eSign

> Electronic-signature service with identity verification (data + email OTP, optional ID photo and
> liveness video with random challenge), PAdES signatures, RFC 3161 timestamps, a hash-chained
> immutable evidence log, daily Bitcoin anchors (OpenTimestamps), write-once custody (S3 Object
> Lock, 10 years) and an evidence package experts can verify independently. Operated by
> A Software Company LLC. Spanish, English and Portuguese.

## For AI agents

- MCP server (Streamable HTTP): https://firmas.verdana.app/mcp — auth: `Authorization: Bearer <API key>` with per-key scopes (leer, crear, recordar, evidencias, anclas).
- REST API contract: https://firmas.verdana.app/openapi.json · operating guide: https://firmas.verdana.app/llms.txt
- Agents act for the SENDER (create requests, track, remind, download and verify evidence). They must never sign for a person; signing links and OTP codes are never returned to agents, and the signing page blocks automated browsers.
- Use idempotency keys when creating requests. Use "reforzada" verification for promissory notes and high-value documents.

## What it is not

- Signature type: electronic signature with traceability, audit trail and immutable integrity. It does not issue certificate-based (digital or qualified) signatures.
- Does not guarantee court outcomes; provides complete, verifiable evidence.
- Biometric data is optional and consent-based. The face is only compared with the photo on the signer's own ID (similarity score); it is never searched against other people, sold or used for training. Identity approval is a human decision unless the issuer sets an auto-approval threshold; nothing is rejected automatically.

## Compliance by country (legal review 2026-10-01; guidance, not legal advice)

- [Colombia (CO)](https://firma-electronica.verdana.app/paises/colombia.html): Firma electrónica con efectos legales (Ley 527 de 1999 y Decreto 2364 de 2012), con trazabilidad completa y evidencia inmutable lista para un proceso judicial.
- [México (MX)](https://firma-electronica.verdana.app/paises/mexico.html): Firma electrónica con los efectos de la autógrafa (Código de Comercio, art. 89), con la trazabilidad y la conservación íntegra que exige la fiabilidad del método.
- [Brasil (BR)](https://firma-electronica.verdana.app/paises/brasil.html): Assinatura eletrônica válida entre as partes (MP 2.200-2/2001, art. 10 §2) e aceita em títulos executivos (CPC, art. 784 §4), com rastreabilidade completa e evidência imutável.
- [Argentina (AR)](https://firma-electronica.verdana.app/paises/argentina.html): Firma electrónica con valor probatorio (Ley 25.506, art. 5), con un expediente pensado para sostener la carga de la prueba.
- [Chile (CL)](https://firma-electronica.verdana.app/paises/chile.html): Firma electrónica con valor probatorio según las reglas generales (Ley 19.799), con trazabilidad completa y evidencia inmutable.
- [Perú (PE)](https://firma-electronica.verdana.app/paises/peru.html): Firma electrónica reconocida por la Ley 27269, con trazabilidad completa y evidencia inmutable para las reglas generales de la prueba.
- [Ecuador (EC)](https://firma-electronica.verdana.app/paises/ecuador.html): Firma electrónica con la misma validez que la manuscrita (Ley de Comercio Electrónico, art. 14), con trazabilidad completa y evidencia inmutable.
- [United States (US)](https://firma-electronica.verdana.app/paises/estados-unidos.html): Electronic signatures carry the same legal effect as handwritten ones (ESIGN Act, 15 U.S.C. §7001; UETA in 49 states). There are no signature tiers: what matters is attribution and record integrity.
- [European Union (EU)](https://firma-electronica.verdana.app/paises/union-europea.html): Electronic signatures admissible as evidence in every member state (eIDAS, art. 25.1), with a full audit trail and immutable evidence.

Machine-readable matrix: https://firma-electronica.verdana.app/cumplimiento.json

## Legal

- Privacy: https://firma-electronica.verdana.app/privacidad.html · https://firma-electronica.verdana.app/en/privacy.html
- Terms: https://firma-electronica.verdana.app/terminos.html · https://firma-electronica.verdana.app/en/terms.html