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QUALIFIED TRUST SERVICES

Legally compliant digital signatures (eIDAS) to drive forward the digitalization of your business processes.

CORPORATE TRUST SERVICES

Cryptography-based trust services
to protect your digital identities,
data and business secrets.

Qualified electronic signature products based on eIDAS - legally binding and secure.

API GUIDE

Upgrade your application with electronic signatures by primesign.





DOCUMENT SIGNING API

Signing of PDF documents. primesign handles document processing and adds a visual signature stamp.

HASH SIGNING API

Signing of hash values. Your application handles document processing and provides the document viewer.

CASH BOX API

RKSV-compliant JWS- or raw signatures for cash box receipts.





primesign TRUST CENTER

All documents for our qualified trust services, certificate revocation list, root-/CA- certificates, etc.

RESOURCES

Fact sheets, product documentation and more.



BLOG

Insights on digital signatures, eIDAS and trust services.

FAQ

Answers on electronic signatures, eIDAS levels and enterprise signing.

FAQ

Signing Insights

Expert perspectives on qualified electronic signatures, eIDAS 2.0, remote and cloud signing, and EU trust services.

Trust Services & Qualified Signatures

Signature APIs for Developers: Document & Hash Signing

Discover how signature APIs enable seamless document and hash signing integration, enhancing security and efficiency in your applications. Learn more.

17 Aug 2026 · primesign Editorial

Compliance & Digital Resilience

RKSV: Austrian Cash-Register Compliance, Explained

Discover how RKSV compliance ensures secure receipt signing in Austria. Learn about cloud and HSM solutions for efficient, ongoing compliance management.

12 Aug 2026 · primesign Editorial

Trust Services & Qualified Signatures

QES vs AES vs SES: The Three Signature Levels Compared

eIDAS defines three electronic signature levels. Simple (SES) is easy but carries the least evidentiary weight; advanced (AES) is uniquely linked to a

12 Aug 2026 · primesign Editorial

Trust Services & Qualified Signatures

Long-Term Validation & PAdES Archiving

Ensure your digital signatures remain valid for decades with PAdES long-term validation and archiving solutions. Protect your important documents effortlessly.

10 Aug 2026 · primesign Editorial

Trust Services & Qualified Signatures

KYC & Remote Identification for Signing

Discover how remote identification enhances the trustworthiness of qualified electronic signatures, ensuring secure and efficient signing without branch visits.

10 Aug 2026 · primesign Editorial

Trust Services & Qualified Signatures

E-Signature Workflows for HR & Onboarding

How e-signature workflows speed up HR onboarding — matching AES, QES and SES to each document, from offer letters to employment contracts.

4 Aug 2026 · primesign Editorial

Trust Services & Qualified Signatures

Cross-Border Recognition of E-Signatures in the EU

How eIDAS makes qualified electronic signatures automatically valid across all EU member states, and what businesses need to know to rely on it.

4 Aug 2026 · primesign Editorial

Sign with confidence

Talk to a primesign expert about qualified e-signatures, seals and remote signing.

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