Electronic signature legitimation before a notary

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Signature authentication is a notarial act through which a notary certifies that a digital signature on a document belongs to the person who claims to have made it. The notary attests that they witnessed the signature or that the person acknowledged the signature as their own before them.

In its online format, this procedure applies exclusively to digital signatures and provides legal security and validity. It is especially useful for technical documents, employment contracts, authorizations, and documents that must be presented to public institutions.

Yes, absolutely. Signature authentication performed online with a registered notary has exactly the same legal validity as that performed in person at a physical notary office.

The process is regulated by current notarial regulations and the resulting document has full legal effect throughout Spain and can be presented to any public or private body.

The complete process is done in less than 24 hours from when you request the service:

• Video conference with the notary: 15-20 minutes
• Preparation of notarial deed: 2-4 hours
• Delivery of authenticated document: maximum 24 hours

In urgent cases, we can speed up the process so you have your authenticated document the same day.

To authenticate a signature online you need:

• Valid ID, residence card, or passport
• The document containing the signature to be authenticated (in digital format)
• Digital certificate or electronic signature (we help you obtain it if you don't have one)
• Stable internet connection for the video conference

The price varies depending on the type of document and the complexity of the procedure. In general, online signature authentication is more economical than the in-person process because we optimize time and resources.

Contact us to receive a personalized quote with no obligation. We guarantee complete transparency in costs, with no surprises or hidden fees.

Yes, it is possible to authenticate the digital signatures of multiple people on the same document. Each signer must participate in the video conference with the notary to verify their identity and certify their signature.

This is especially useful in employment contracts with multiple parties, joint authorizations, or technical documents requiring signatures from several professionals.

Yes. The document with signature authentication is valid in Spain and can be used internationally. For use in countries that are part of the Hague Convention, we can process the corresponding apostille.

The apostille is a seal that certifies the authenticity of the notarial document for recognition in more than 120 countries. We help with this additional procedure if you need it.

They are different concepts:

• Digital signature authentication: It is the notarial certification that an electronic signature belongs to a specific person.
• Electronic signature: It is a digital signing method that allows documents to be signed electronically.

Important: Online signature authentication only applies to digital signatures, not handwritten signatures. For handwritten signatures, you must visit a notary office in person.

No, the process is very simple and designed to be accessible to anyone. You only need:

• To know how to send emails and attach files
• To be able to connect to a video call (we send you a direct link, no installations)
• To have your ID and the document to authenticate at hand

Our team guides you through each step and resolves any technical questions you may have.

Completely safe. We use state-of-the-art encryption systems to protect all your data and documents. Additionally:

• Notaries are subject to professional secrecy
• We comply with GDPR and all data protection regulations
• Your documents are stored on secure servers with restricted access
• Once the procedure is completed, you can request deletion of your data

Yes, even if the document is in another language, the notary can authenticate the signature. However, it is advisable to provide a sworn translation of the content so the notary can verify that it is not an illegal document or contrary to Spanish regulations.

If you need a sworn translation, we can put you in touch with trusted official translators.

If you detect any error in the authenticated document, contact us immediately. We will review the case and, if the error is ours, we will correct it at no additional cost.

It is important that you carefully review the document before using it to ensure all data is correct.