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Legally sign documents online with the Estonian ID-card (EstEID)

You and your business partners can sign important contracts directly in sproof sign with an existing Estonian ID-card.


Overall, Estonia is considered a pioneer in terms of digital administration: many administrative procedures can be completed online and elections can also be conducted conveniently via the Internet. The Estonia ID plays a central role as a secure access key to the country's digital world. The Estonia ID is a state identification number used in Estonia. It is used to uniquely identify citizens and companies and is thus an important basis for many official procedures and transactions in the country.

The Estonia ID consists of an eleven-digit number and an electronic chip on the back of the ID card. With this chip, various digital services can be used, such as online banking, applying for documents or the qualified signature of documents.

Frequently asked questions

Are signatures created with Estonia ID legally valid?

How does the identification for a qualified signature with the Estonia ID work?

How to sign with Estonia ID in sproof sign?

Can signature recipients also choose other signature providers?

Use your existing qualified signature directly in sproof sign.

Digital Signature 2.0 - Qualified Signing without Borders throughout Europe

sproof has been working intensively on a newly developed interface for qualified signing throughout Europe over the past few weeks. Now the beta version has been officially transferred to the test phase with some important key accounts.

We have integrated the most important signature providers

We continuously update the QES & eID Hub with new providers and authentication methods to make it as easy as possible for you to obtain legally valid digital signatures - at no extra cost.
sproof sign is the highest-rated provider in the e-signature category on the independent evaluation platform OMR Reviews for Q3 and Q4 2023, as well as Q1 2024.