Notarisation of the authenticity of a signature

You need the services of a notary public when you need the authenticity of your signature officially certified.

When you need the authenticity of your signature on a document to be certified by a notary public, you have to visit the Digital and Population Data Services Agency in person.

Provide photo identification and sign the document in the presence of the notary public. A note confirming the authenticity of you signature will be recorded on the document and the notary public

will sign the document.

Do the following

  • You have to visit the agency in person.

  • Depending on the service location in question, you may have to make an appointment in advance. If that is the case, it will be mentioned in the service location's information.

Addresses of the service locations


The notarisation of the authenticity of your signature costs EUR 14 per signature.

Processing time

If the notary public is available, they will notarise the authenticity of your signature while you wait.

Links to laws related to the matter

Act on Notaries Public (in Finnish)

Frequently asked questions