eInvoice Signature as a Service
eIDAS-compliant Solution for Qualified Electronic Signatures

eInvoice Signature as a Service

Applying eIDAS-compliant Qualified Electronic Signatures to tax-relevant Documents for Legal and Compliance Requirements

  • Trustworthy generation, validation, and audit-proof archiving of Qualified Electronic Signatures
  • Easy integration of Qualified electronic signatures into an existing eInvoicing work-flow
  • High availability in the creation and verification of signatures
  • Streamlined processes and management for auditing, approval, and secure access


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Key Benefits

Key Benefits


The Root of Trust for Secure and Trustworthy Verification

eInvoice Signature as a Service offers centralized generation, verification, and archiving of electronic signatures for electronic invoicing or other electronic tax-relevant docu-ments.


Full eIDAS-Compliance

eInvoice Signature as a Service uses signatures recognized EU-wide in accordance with Art. 41, Paras. 1,2,3 REGULATION (EU) 910/2014 eIDAS.


Standardized Integrations for Easy Implementation in Existing Business Processes

eInvoice Signature as a Service provides standard interfaces for the integration with PAdES, XAdES, and CAdES signatures, enabling their direct integration into PDF, PDF/A, and XML documents.



eInvoice Signature as a Service enables eIDAS compliance for the handling of business documents, with an emphasis on the signing of invoices, incom-ing orders, delivery bills, or bank statements.

eInvoice Signature as a Service for the generation, validation, and audit-proof archiving of qualified electronic signatures, which are required for legally compliant digital business transactions.

It is based on the creation of qualified electronic signatures as separate files or containerized arbitrary binary files for bulk signatures, depending on your requirements. This makes it a perfect fit to provide proof of the integrity and authenticity of electronic workflows and streamline operations by reducing the requirement to manage traditional paper-based processes.

Signature Creation and Compliance: eInvoice Signature as a Service offers all necessary functions to apply qualified electronic signatures to invoices. The created qualified electronic signatures comply with REGULATION (EU) 910/2014 on electronic Identification, Authentication, and trust Services (ab-breviated eIDAS). The requirements of the EU Tax Directives and the German Value Added Tax Law (UStG) for electronic invoices and credit memos are also fulfilled.

Signature Storage and Compliance: eInvoice Signature as a Service provides fully automated and audit-proof storage of the created signatures in compli-ance with eIDAS, the EU eInvoicing Directive and the EU VAT Directive, and national provisions of the EU member states Regulation (EU) 910/2014, as well as meeting various tax authority requirements such as the German AO, HGB, GoBS and GDPdU.

eInvoice Signature as a Service has a considerable advantage over on-premises systems in terms of the efficiency with which it can be integrated into existing processes via standard interfaces.

The solution provides large-scale inspections of qualified signatures through a powerful web service, including online validity checks for included certificates (via OCSP). The multi-language check reports are available in German, English, French, and other languages upon request. 


Offering eIDAS-compliant Qualified Electronic Signatures

  • Creation of qualified electronic signatures
  • Validation of qualified electronic signatures
  • Online validity checks of qualified electronic signatures in various languages
  • Audit-proof long-term archiving 

Creates Trust and Long-Term Signature Validity

  • Compliant with REGULATION (EU) 910/2014 (eIDAS)
  • Signature file format: CMS (CAdES)

Supports eIDAS-Compliant Integrated Signatures

  • Direct integration into PDF, PDF/A and XML documents
  • Direct integration into PAdES, XAdES, CAdES signature formats

Streamlined Processes & Management

  • Benefit from improved audit processes & tracking
  • Reduces backlog - document approval is streamlined and archived
  • Enables flexible access via standard interfaces REST, SFTP and SMTP

Reduces Total Cost of Ownership

  • No hardware required
  • No handling cost and effort

Easy Integration into a Process Environment

  • Standard interfaces ensure rapid and easy integration into existing processes
  • Ensures frictionless collaboration between all trusted services
  • Provides maximum long-term interoperability

High Availability

  • Maximum availability in the creation and verification of signatures: 99.5%

Technical Specifications:

Standard Interfaces

  • REST interface with encrypted connection (HTTPs) for transmission, pickup and status query for data/documents to be signed, stamped, archived, and checked
  • SFTP interface with secured file transfer Authentication using account credentials or certificates
  • SMTP interface for E-Mail interface (Proxy) using encrypted connections (START TLS) via mail relay/smart host.

As a service

Our as-a-service options are hosted by Utimaco in certified data centers and include everything from set-up to deployment to maintenance.

Related to this product


Timestamp as a Service

The First eIDAS-certified Timestamping Service Creating Qualified Electronic Timestamps for Document and Data Authenticity Requirements

Learn more

Contact us

We look forward to answering your questions.

How can we help you?

Talk to one of our specialists and find out how Utimaco can support you today.
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