How to Prove a Fact Existed: Notarial Records and Digital Proof

A page your competitor deletes the following week. A message the other side swears never arrived. A delivery that showed up damaged and got thrown away before anyone photographed it. These are facts, and a fact nobody recorded stops existing the moment it changes.

Common law handles this with sworn statements and notarised affidavits. Civil law systems built a dedicated instrument: an official who goes to the fact, looks at it, and writes down what they saw. Brazil calls it an ata notarial, Spain an acta notarial, France a constat, Germany reaches for notarial recording of a different kind.

This guide covers what those instruments can and cannot establish, how each system treats digital facts, and where a cryptographic timestamp does the same job for a fraction of the cost.

In most of the civil-law world, the instrument has a statutory definition, and Brazil's is the clearest.

Article 384 of the Brazilian Code of Civil Procedure provides that the existence and the manner of existence of a fact may be attested or documented, at the request of the interested party, by a record drawn up by a notary. Its sole paragraph adds that data represented by image or sound recorded in electronic files may be included in the notarial record.

Two things matter there. The record covers not only that something happened but how it presented itself. And electronic content was written into the statute expressly, in 2015, rather than being argued into it case by case.

Spain draws the boundary from the other side. Under article 17 of the Ley del Notariado, notarial records ("actas") document the establishment of facts or the notary's perception of them, provided that by their nature they cannot be classed as acts and contracts. Declarations of will, consent and contracts go into a deed instead.

The distinction is worth memorising: a deed records what the parties want, a record of facts records what the official saw.

Common law has no direct equivalent. The nearest tool is a sworn statement, an affidavit, in which the person who witnessed the fact swears to it before a notary. The notary attests to the oath, not to the fact itself, which is a meaningfully weaker position.

Two families of use, and the second has taken over.

Physical facts. The condition of a property before and after works, water damage, an abandoned building site, a non-conforming delivery, a notice posted on a wall.

Digital facts. Now the dominant demand everywhere:

• the content of a web page on a given date, before it changes;
• social media posts, reviews, comments;
• trademark infringement or copied text;
• messaging conversations and emails with their headers;
• the price or terms displayed on a given day, which matters when a dispute turns on what the contract actually said.

Digital records follow a strict method: clearing the cache, disabling proxies, timestamping, and describing the navigation path and equipment used. The method is not decorative. Its absence is the first thing an opponent attacks.

Three limits apply everywhere. The record does not judge: whether the content was defamatory or the loss real is for a court. It creates no rights: recording that you have used a mark for ten years does not give you the mark. And it does not reach backwards: the official records what exists when they look.

Three instruments, three strengths, constantly confused.

The gap between the first two is larger than it looks. A notarial record puts a neutral official's observation on the file. An affidavit puts your own account on the file with a formality attached. If the other side disputes what happened, those are very different starting positions.

Cost follows the same order. A notarial record with a site visit is the most expensive, an affidavit costs the notary's fee for the oath, a witness statement costs nothing.

Every instrument above answers the same question: did a neutral person observe this? A large share of evidence problems are not that question at all.

When what you need to show is that a document existed on a date and has not changed since, nobody needs to observe anything. The file is already in your hands.

Civil procedure has quietly made room for this. Article 411 of the Brazilian Code of Civil Procedure treats a document as authentic when the notary recognises the signature, or when authorship is identified by any other lawful means of certification, including electronic means, or when the party against whom it is produced does not challenge it.

Read the second limb again. Statute does not require a notary for authenticity. It accepts any lawful means of certification, electronic ones included.

In the European Union, article 25 of the eIDAS Regulation provides that an electronic signature shall not be denied legal effect solely because it is electronic, and that a qualified electronic signature has the equivalent legal effect of a handwritten signature.

The dividing line is short enough to remember. If the fact sits with someone else, get it recorded. If the fact is your own document, timestamp it.

A cryptographic anchor gives three things a notarial visit cannot: it is immediate, it costs a fraction, and anyone can re-run the check without going through you. It also tells you nothing about the outside world, which is exactly why the two coexist.

Five questions, in this order.

1. 1.
   Whose fact is it? Yours, or someone else's? Your own documents almost never need an official visit.
2. 2.
   Will it survive? Online content, a site under repair and a conversation on someone else's phone are all perishable. Move first, argue later.
3. 3.
   What exactly needs establishing? Write the request as a sentence a stranger could execute. "Record the content of this exact URL on this date" beats "record the unfair competition", which the official is not allowed to characterise anyway.
4. 4.
   Who will challenge it, and on what? If the likely attack is on method, insist that the record describes the steps taken, not just the result.
5. 5.
   What does it cost against what is at stake? A record with a site visit is worth it in a dispute over a building. It is rarely worth it to prove you sent a proposal on Tuesday.

One habit worth adopting regardless: timestamp your own documents as you create them. Ready-made contract templates help here too, since a document you drafted deliberately is easier to defend than one assembled from email. Timestamping costs almost nothing, and the day you need to prove a date you will not be reconstructing it from an inbox.