Welcome to Subsign

The Portal for Electronic Signatures

Digital signature wizard


Consistent Swissness for maximum legal certainty

Security and Data Protection

Subsign was designed and developed entirely in Switzerland and is hosted in a Swiss data centre built to FINMA specifications and certified to ISO 27001. All data is handled in accordance with GDPR and Swiss law (nDSG).

High security and compliance
Swiss hosting (ISO 27001)
GDPR and DSG compliance

Use Cases

The perfect solution for every industry


The qualified e-signature replaces the handwritten signature and enables electronic documents for lawyers, notaries and bailiffs in accordance with Swiss legislation under ZertES.


Whether balance sheets, annual financial statements, client agreements or release declarations: Have your clients sign contracts and agreements electronically - quickly, easily and legally secure.

Real Estate

With Subsign, contracts and processes of all kinds that require qualified signatures can be signed easily and in a legally compliant manner. Contracts can be signed electronically and in a legally binding manner within minutes, both in the Swiss and in the European legal area.




Frequently Asked Questions
A document was rejected by a party, will the signatures already applied be charged?

Yes, a signature is charged to the signature package as soon as it has been confirmed with the cell phone. The document contains valid signatures and could be uploaded and signed again if necessary.

We mainly sign in Switzerland, but from time to time we also need signatures for the EU. Is that possible with Subsign?

Yes, in this case you can book an additional package for the EU in addition to the main package with CH signatures.

How can I be identified for the Qualified Electronic Signature (QES)?

It depends on the jurisdiction in which you want to sign. On the information page of Swisscom Trustservices AG you will always find the current identification methods: Swisscom Trustservices AG