ZertES-compliant fast-track e-signing

Identification via valid Swiss mobile number and advanced electronic signature in Switzerland

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Over 100 partners in Europe and Switzerland trust our e-signature services.

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Product description

Advanced electronic signature with Swiss mobile number

Advanced electronic signature with Swiss mobile number

The embedded remote signature software from Swisscom Trust Services enables quick customer identification and subsequent approval of an advanced electronic signature via SMS. By implementing this fast track e-signing solution, your customers can benefit from a seamless customer experience without any media disruptions and securely and fast concluding of contracts.

Identification and AES in accordance with Swiss Telecommunications Law

Identification and AES in accordance with Swiss Telecommunications Law

The identification for the fast track advanced e-signature (AES) requires customers to have already verified themselves according to the legal requirements of the Swiss Telecommunications Law and possess a valid Swiss SIM card and mobile phone number. In the e-siging process of an application, a hash value of the document to be signed is created and signed by Swisscom Trust Services. To authorize the AES, the customer receives a one-time password via SMS, which they then enter into the signature application.


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Discover the detailed architecture of our remote e-signature solution in this informative whitepaper.

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Popular features are enabled through the integration of the remote e-signature solution.

Pan-European certified solution

Our innovative remote e-signature solution, as the platform from a leading European provider, seamlessly integrates with the legal requirements of the EU/EEA and Switzerland. With our trust service or certification service accreditation, Swisscom Trust Services complies with the strict legal requirements of the EU eIDAS regulation and the Swiss Signature Act ZertES. Our solution lets you electronically sign confidential documents and contracts securely and legally, regardless of your jurisdiction.

Embedded signing software

Our embedded remote signature software offers a comprehensive orchestration of electronic signatures and online identification and authorization methods that can be seamlessly integrated into your signature application. With the remote e-signature solution, you can use white-labeling to benefit from our cutting-edge backend technologies while presenting your application to your customers. You can customize the solution to fit your use case and user experience, effectively meeting your customers' needs.


Only a hash value of the electronically signed document is transmitted during the signature process in an application. This ensures that Swisscom Trust Services never have access to the contents of the digital documents. The processing of digital identities for electronic signature purposes occurs in georedundant data centers in Switzerland. Unlike most others, Swisscom Trust Services is responsible for properly issuing electronic signatures, timestamps, and certificates.

Audited and standardized

Our auditors continuously assess our processes and systems as an accredited certification service in Switzerland and a provider of trust services in the EU. All identification and authentication methods are approved according to the signature level (qualified or advanced) and in the legal jurisdictions of Switzerland and the EU. Furthermore, our signature solution adheres to the latest international standards, such as ETSI, ISO, RFC, Common Criteria, etc.

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Why Swisscom Trust Services

Swisscom Trust Services is an accredited trust service provider in Europe and a certification service provider in Switzerland. We assist software applications and solutions providers in digitizing the final steps of processes by seamlessly integrating our legally secure electronic signatures and seals. We take into account our clients' industry-specific and regulatory requirements.

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Qualified and advanced electronic signatures - recognized in the EU and EEA


Qualified and advanced electronic signatures - recognized in Switzerland

GDPR and FADP compliance

Protection of our customer's privacy and personal rights by the data protection requirements in the EU and Switzerland


Our standardized APIs leverage OIDC and OIDC-PAR/CIBA and meet the requirements of ETSI Standards TS 119 432 for remote signatures.

How customers utilize the fast-track process

relies on Fast-Track from Swisscom Trust Services to digitalise its processes

True Wealth AG relies on the fast track from Swisscom Trust Services to digitalize its processes.

Optimizing the customer experience seamlessly boosts the conversion rate. It speeds up contract conclusion: True Wealth customers can quickly identify themselves for advanced electronic signatures using their Swiss mobile number through Swisscom Trust Services' fast-track process.


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Additional products available in the embedded e-signing platform