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Legal

When a notary is needed and when not

Electronic signature covers a lot, but not everything. Where the line is.

Updated on 13/08/2026

The question arrives as soon as someone gets used to signing without travelling: does this count too? The short answer is that most business-to-business contracts do, and a few do not — and the few that do not are fairly well defined.

The line, broadly

Type of documentNormally
Commercial contracts between companiesElectronic signature suffices
Employment agreements and amendmentsElectronic signature suffices
Professional engagements and sign-offsElectronic signature suffices
Acts the law subjects to a notarial deedA notary is required, and electronic signature does not replace one
Acts requiring registrationCheck: the formal requirement governs
This is indicative. What your specific document requires is stated by the rule governing it, not by a table.

Important

Where the law requires a form — a notarial deed, notarial intervention, registration — that form is a requirement, not a recommendation. No electronic signature, however advanced, replaces it, and signing that way an act which required it can leave it ineffective.

What electronic signature does solve in those cases

Everything around the notarial act: the preliminary agreement, prior sign-offs, the documentation to be gathered beforehand, later amendments. That is usually ninety per cent of the paperwork, and where the time goes.

Watch out

This article cannot tell you whether your specific document needs a notary. What it can do is prevent the reverse mistake: do not stop signing everything else electronically because of doubt about one.

Worth knowing

If you have recurring doubts about one document type, ask your adviser once and write the answer down. It is a consultation that serves every later case.

Can something signed electronically be notarised?

That is a question for your notary; it depends on the document and how it was signed.

Is it valid outside Spain?

The European framework recognises electronic signatures across the EU; outside it depends on the country.

Does a qualified signature replace a notary?

No. They are different things covering different requirements.

A real case

The situation

A company stops signing commercial contracts electronically over doubt about one that needed a notary.

What you do

  1. Asks once which types require a formal deed
  2. Keeps signing the rest electronically

What you get

Recovers the saving on 95% of its documents without risking the 5% that genuinely required the form.

The situation

Something that did not need it is taken to the notary.

What you do

  1. Checks beforehand what that act requires

What you get

A formality and a cost are saved.

The situation

Something that did require it is signed without a notary.

What you do

  1. Checks with the adviser before signing

What you get

The act happens where it should.

The situation

A document is missing on signing day.

What you do

  1. Checks the list in advance

What you get

The appointment is not repeated.

The situation

The notarial copy is kept in a drawer.

What you do

  1. Captures and stores it in the file

What you get

It is found without going to the archive.

The situation

A copy is requested years later.

What you do

  1. Keeps the file with its date

What you get

The request is resolved without a new formality.

This article answers

  • can i sign this without a notary
  • which documents need a notarial deed
  • does electronic signature replace a notary
  • notarising an electronically signed contract