Terms of Use

1. Acceptance

By accessing or using Quathos Sign, you agree to these Terms and to our Privacy Policy. If you use the Service on behalf of an organization, you confirm that you are authorized to bind that organization.

2. The Service

Quathos Sign lets you upload documents, collect electronic signatures in a defined order, and verify signed documents through an audit trail. Features, plans, and limits may change as the product evolves.

3. Accounts and organizations

You are responsible for the accuracy of your account information and for keeping your credentials confidential. You are responsible for activity under your account and within your organization (tenant). Data is isolated per organization.

4. Acceptable use

You agree not to:

• Upload content you have no right to use, or that is unlawful or infringing.
• Attempt to break tenant isolation, access other customers’ data, or probe the Service’s security without authorization.
• Use the Service to send spam or to forge signatures or identities.
• Interfere with or disrupt the integrity or performance of the Service.
• Use the Service to collect biometric identifiers or biometric information — fingerprints, voiceprints, face or hand geometry, iris or retina scans — from signers or from anyone else, or attempt to derive them from content stored here. See section 6.

5. Electronic signatures and legal validity

Quathos Sign supports simple, advanced and qualified (ICP-Brasil certificate) electronic signatures. Each envelope is issued under a legal regime you choose, and that choice determines the consent text your signers accept and how the evidence describes the signature.

United States. Electronic signatures and records are valid under the federal ESIGN Act (15 U.S.C. ch. 96) and applicable state law — the Uniform Electronic Transactions Act, or ESRA in New York. These laws are technology-neutral: they require no certificate authority and define no higher tier of electronic signature. Where a consumer transaction requires disclosures under 15 U.S.C. §7001(c), Quathos Sign presents them before consent is collected; you remain responsible for honoring the paper-copy and withdrawal rights those disclosures describe, since they run to you as the sender, not to us.

Assurance levels. Electronic signatures are recognized at different assurance levels under applicable local law. Where your document requires a higher level, Quathos Sign offers qualified signatures with the signer's ICP-Brasil digital certificate (A1), embedded in the PDF in the PAdES standard, with the certificate chain validated against the official ITI trust store. It is your responsibility to confirm that the level you choose meets the legal requirement of your specific transaction.

Transactions where electronic signature does not apply. Some documents are excluded by law, and no platform can make an electronic signature valid for them. Under 15 U.S.C. §7003 this includes: wills, codicils, and testamentary trusts; adoption, divorce, and other family-law matters; most of the Uniform Commercial Code (other than §§1-107 and 1-206 and Articles 2 and 2A); court orders, notices, and filings; notices of default, acceleration, repossession, foreclosure, or eviction on a primary residence; cancellation of health or life insurance benefits; cancellation of utility service; and notices of product recall or of a material failure affecting health or safety. In some jurisdictions, additional acts — such as transferring or registering real property, electronic tax invoices, and acts signed by public officials — require a qualified signature; for those, use the qualified (ICP-Brasil) signature level and confirm it satisfies the specific formal requirement.

You are responsible for choosing a legal regime and a signature level appropriate to your document’s risk and legal requirements, and for confirming that electronic signature is permitted for the transaction at hand. Quathos Sign cannot read your documents and does not check this for you.

6. Biometric data and identity verification

Quathos Sign collects no biometric data and offers no biometric feature. The signer authentication methods available to you — one-time codes by email or SMS, a match against identifying data you supply, knowledge-based questions, and the signer’s digital certificate — are non-biometric, and the platform derives no biometric identifier from any file that passes through it. The Privacy Policy states this in full.

You must not use the Service to collect biometric identifiers or biometric information from signers or from anyone else — for example, by requiring a signer to upload a fingerprint, a face scan, or a photograph or video taken so that someone can be identified by their physical characteristics. If, despite this, you request or upload content containing biometric data, you do so as controller and on your own legal basis: obtaining any written release or specific consent, giving the notices, publishing the retention schedule and carrying out any impact assessment the law applicable to that individual requires are your responsibility, not ours. You will defend and indemnify Quathos LLC against claims arising from biometric data you collected, requested or uploaded through the Service.

This does not stop you from sending a document that happens to contain a photograph — an identity document attached to a contract, for instance. The distinction that matters is purpose: we host and deliver the file, and no one on our side measures a face, a fingerprint or a voice from it.

7. Your content

You keep all rights to the documents and data you upload. You grant Quathos LLC the limited rights needed to host, process, and deliver them, solely to provide the Service. We do not claim ownership of your content.

8. Intellectual property

Quathos Sign, including its software, design, and trademarks, is owned by Quathos LLC. These Terms grant you a limited, non-exclusive, and non-transferable right to use the Service. They transfer no ownership in the platform.

9. Plans and fees

Paid plans, prices, and limits shown in the Service may be placeholders during development, and they are subject to change. Where fees apply, we bill them through our payment provider under the plan you select.

10. Disclaimers

The Service is provided “as is” and “as available”, without warranties of any kind, express or implied, to the maximum extent permitted by law. We do not warrant that the Service will be uninterrupted or error-free.

11. Limitation of liability

To the maximum extent permitted by applicable law, Quathos LLC will not be liable for indirect, incidental, special, or consequential damages, or for loss of profits or data, arising from your use of the Service.

Quathos LLC's total liability arising out of or relating to the Service is limited to the greater of (i) the amounts you paid in the 12 months preceding the event and (ii) US$ 500.00. These limits do not apply to wilful misconduct, fraud, personal injury, or anything applicable law does not allow to be limited.

If any provision of these Terms is held invalid or unenforceable in a given jurisdiction, it applies there to the fullest extent permitted and the remaining provisions stay in force.

12. Suspension and termination

We may suspend or terminate access that violates these Terms or that poses a security or legal risk. You may stop using the Service at any time. Certain provisions survive termination.

13. Governing law

These Terms are governed by the laws that apply to Quathos LLC in the State of Texas, United States. This does not override the mandatory consumer or data-protection rules of your place of residence.

14. Changes

We may update these Terms. If you keep using the Service after changes take effect, you accept the updated Terms.

15. Contact

Questions about these Terms? Email contact@quathos.com.