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Legally sign documents online with Smart-ID

Use your existing digital proof of identity and sign important documents online with the highest signature standard.


The Smart-ID is currently used in Estonia, Latvia and Lithuania. It can be used for registering with electronic services, for online banking and for signing documents. Smart-ID signatures are legally binding, recognized in all EU countries and have the same legal effect as handwritten signatures. The use of Smart-ID for personal identification is free of charge and completely unrestricted. You can use Smart-ID anytime and anywhere because you always have it with you on your smart device, no additional devices are needed. Smart-ID works as fast as your internet connection allows and is very convenient to use.

Frequently asked questions

Why to sign digital instead of analogue?

Is the digital signature 100% legally valid?

Is sproof sign GDPR compliant?

How can I invite people to sign?

Can signature recipients also choose other signature providers?

Do externals have to pay for signature or be sproof sign user?

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.
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.