Clavister IdSign is an on-premises electronic signature solution that processes all signing operations within an organisation's own infrastructure, ensuring no documents or sensitive data leave the internal environment. The product supports single and multi-signature workflows for documents, applications, and decisions. It integrates directly into existing e-services, web applications, and business processes, embedding the signing step within ongoing workflows rather than redirecting users to external platforms. Key signing capabilities include: - PDF document signing in PAdES (PDF Advanced Electronic Signatures) format - XML document signing in XAdES (XML Advanced Electronic Signatures) format - Long-term signature validation with embedded timestamps and certificate data - Automatic document conversion to the required PDF/A standard prior to signing - Electronic seals tied to a legal entity rather than an individual signer Organisations retain full control over signature attributes, including what information is embedded in each signature (e.g. signer name, employee ID, authentication method, social security number). The signing certificate is owned by the organisation, not a third-party provider. Identity verification is handled via a built-in identity provider or by connecting an existing external identity provider. Multi-signer approval workflows allow organisations to define participants, documents, and signing order in a single flow, with automated routing and tracking. Monitoring capabilities provide visibility into signing activity across the organisation, enabling detection of unusual patterns. The solution is designed to support compliance with legal and regulatory standards for electronic signatures.