Addo Sign is securely operated in Denmark, providing companies and organizations with full control over the location of their data. Local operation ensures that all data processing takes place within the EU which is essential for meeting the requirements of GDPR.
ISAE 3402 is an international auditing standard used to document and report on controls at service providers, particularly in relation to IT systems, processes, and security. It is used by you as a company to ensure that we, as your provider, have adequate internal controls in place.
ISAE 3000 is an international auditing standard used when an independent third party is to issue a statement on "non-financial information," such as data protection, information security, ESG reports, GDPR compliance, or internal controls that are not directly related to financial statements.
Addo Sign processes and stores personal data in EU-based data centers. See the list of our subcontractors.
Addo Sign uses approved eID standards (electronic identification) such as MitID and BankID to sign digital documents. Using approved eID standards for digital signing provides a foundation for secure, legally recognized, and widely accepted digital transactions, thereby strengthening trust in the digital signature ecosystem.
Documents signed with Addo Sign comply with eIDAS, the EU regulation on electronic identification and trust services. This means that Addo Sign ensures the integrity, authenticity, and legal validity of your digital signatures.
Addo Sign supports both advanced and qualified signatures, which meet the requirements for unique identification of the signer, control over the signing key, and protection against subsequent alterations. Understand the differences – and see our usage recommendations.
eIDAS defines three types of digital signatures – each with its own level of security. But which one should you choose? Here are our recommendations.
Addo Sign uses PAdES (PDF Advanced Electronic Signatures). PAdES is the European standard for digital signatures in PDF documents. The standard complies with the eIDAS regulation and is ideal for the long-term preservation of legally binding documents.
Access our audit report and see on the final page that the document is signed using Addo Sign. All information is also stored in the PDF and sealed with PAdES, ensuring it cannot be tampered with.
Use Addo Sign’s validation service to verify the authenticity of any PDF document and confirm whether it has been electronically signed with Addo Sign.
To ensure transparency regarding the use of Addo Sign, you can find our current terms and conditions that all customers are obliged to follow. You will also find information about our responsibilities, data processing and user rights.
The company behind Addo Sign is the Nordic firm twoday.
twoday is a product and IT consulting company – formerly known as Visma Consulting A/S, while Addo Sign was previously known as Visma Addo.
From our offices across Scandinavia, we deliver solutions in areas such as data & AI, software development, cloud platforms, and business applications.
Code of Conduct
Download our Code of Conduct
Headquarters
Sundkaj 125, 2150 Nordhavn
Denmark
Security-related or general questions about our services can be sent to support@addosign.com or via our online chat at support.addosign.com. Your inquiry will then be forwarded to the appropriate contact person at Addo Sign.
Contact
support@addosign.com
Supportsite
support.addosign.com
