Qualified Signatures, Stamps & Seals

Whether you’re a public institution, bank, or enterprise operating across borders, Circularo Qualified Signatures & Seals powered by Datasure deliver verified authenticity, integrity, and long-term legal validity - all within your familiar Circularo workflow.

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Trusted by the leaders across industries

Why Qualified Signatures & Seals Matter

Achieve legally binding digital signing equivalent to handwritten signatures.

Meet the highest compliance and security standards under eIDAS and ETSI.

Ensure document integrity, origin, and authenticity throughout its lifecycle.

Enable cross-border recognition of trust services across the EU and beyond.

Key Circularo Add-Ons

QTSP TimeStamp Add-On

Proof that time is on your side. Apply qualified timestamps to ensure document integrity and traceability. Protect against tampering or post-signature modification. Maintain verifiable records that meet ETSI and eIDAS requirements.

Coming Soon

QTSP eSeal Add-On

Protect your organization’s identity. Add qualified electronic seals to safeguard document origin and authenticity. Certify that files truly come from your organization, not an individual user. Ensure business-wide non-repudiation.

Coming Soon

QTSP eSign Add-On

Sign with the highest level of assurance. Use qualified electronic signatures (QES) - legally equivalent to handwritten signatures. Ideal for government, banking, healthcare, and cross-border digital transactions. Backed by trusted QTSPs.

Levels of Assurance - Fit for Every Use Case

Circularo ensures every document, transaction, and identity event carries the right level of assurance - from signing to sealing to long-term validation.

TimeStamp

Proof of existence and integrity

Every action, approval, or signature is automatically timestamped to provide tamper-evident proof of when it occurred.

Qualified timestamps (eIDAS & ISO 18014)

Independent time authority validation

Long-term evidentiary value

Signature

Proof of authorship and intent

Circularo supports legally binding electronic signatures with embedded audit trails and identity verification for total trust.

Secure signer authentication (KYC/MFA)

Legally valid (eIDAS, ESIGN)

Hash integrity checks

Seal

Proof of origin and authenticity

The Circularo organizational seal ensures documents are not only signed by individuals but also digitally sealed by the issuing entity.

Organizational sealing certificates

Automated application

Trusted eArchiving & non-repudiation

Combined Assurance Across the Lifecycle

Together, Timestamp + Signature + Seal create a complete chain of trust - verifying identity, ensuring document integrity, and preserving long-term evidentiary value.

Authenticated at the user level

Authorized at the organizational level

Preserved at the evidence level

100%

Trust

Compliance & Security Credentials

Circularo’s Qualified Signatures & Seals powered by Datasure are fully aligned with European and international standards for digital trust.

Fully eIDAS-compliant
Supporting qualified trust services

ETSI-certified
EN 319 411 and TS 119 461

Remote Identity Verification
Options through PVID

ISO 27001, SOC 2 & GDPR
Compliant data processing

Value for Customers

End-to-end secure and compliant signing directly within Circularo.

Flexible trust levels to match regulatory and business requirements.

Global interoperability, supporting thousands of verified IDs.

Simplifies adoption of legally binding digital workflows without compromising data sovereignty or compliance.

The most trusted way to sign, seal, and protect what matters.

Circularo’s Qualified Signatures & Seals powered by Datasure combine legal certainty, digital convenience, and sovereign security - ensuring your organization can operate with confidence in every document and every jurisdiction.

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Frequently Asked Questions

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Who is Datasure?

Datasure is a trusted Qualified Trust Service Provider (QTSP) operating under the eIDAS regulatory framework. The company delivers certified qualified timestamps, digital signatures, and seals that meet the highest legal and technical standards for electronic transactions globally. Learn more

Why does Circularo partner with Datasure?

Circularo partners with Datasure to provide customers with qualified electronic trust services that extend Circularo’s platform from secure signing to legally recognized, long-term validation. This partnership ensures every transaction can carry a qualified signature, seal, or timestamp - all issued under strict regulatory compliance. Learn more

What are qualified timestamps, qualified signatures, and qualified seals?

Qualified Timestamp - guarantees when a document or action occurred, issued by a certified time authority.
Qualified Signature - identifies the signer and confirms intent, legally equivalent to a handwritten signature under eIDAS.
Qualified Seal - authenticates documents issued by an organization, ensuring origin and integrity.

Together, these elements create full lifecycle assurance for every document processed in Circularo.

Is this service secure to use and compliant?

Absolutely. All Datasure-issued trust services comply with eIDAS, GDPR, ISO 27001, and other international data protection and cryptographic standards. Each operation is backed by certified hardware security modules (HSMs) and full audit traceability, ensuring legal validity and data integrity across all transactions.