Attestation and compliance

Meet legal e-signature requirements for ESIGN, UETA, eIDAS, and country-specific standards like Mexico NOM-151

This page covers e-signature compliance. For HIPAA compliance or SOC 2 compliance, see their dedicated pages.

SignatureAPI is legally binding and compliant with US e-signature regulations (ESIGN and UETA), the European eIDAS regulation (at the SES level), and similar laws around the world.

Some countries have additional legal requirements. Use the attestation property to apply a country-specific standard to an envelope.

Available attestations

Value	Description
none	No attestation. This is the default and applies to most countries, including the US and EU member states.
mx_nom151	Mexico NOM-151 compliance. See details below.

Mexico NOM-151

To enable NOM-151 attestations for your account, contact support.

NOM-151 defines the legal standards for data message preservation and document digitization in Mexico.

When attestation is set to mx_nom151, a preservation certificate in ASN.1 format is attached to the deliverable. SignatureAPI also adds a verification link on the last page of the deliverable. Both the certificate and the deliverable can be verified using any ASN.1 signature verification tool.

To use NOM-151, set attestation to mx_nom151 when creating the envelope:

// POST https://api.signatureapi.com/v1/envelopes
// X-API-Key: key_test_...
// Content-Type: application/json

{
    "title": "Contrato",
    "attestation": "mx_nom151",
    "documents": [
        //...
    ],
    "recipients": [
        //...
    ]
}

NOM-151 attestation adds $0.10 per completed envelope.