A Chat Screenshot Can Be Evidence: What Makes It Valid

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Screenshots, messaging app conversations and emails are offered as evidence in thousands of lawsuits, but not every digital file persuades a judge. Whether the court accepts them depends on authenticity, integrity and proper technical preservation of the material.

Freedom of Evidence and the Electronic Document

Brazilian procedural law follows the principle of freedom of evidence. Article 369 of the Code of Civil Procedure allows the parties to use every lawful means, as well as morally legitimate ones, to prove the facts that support their claim or defense. There is, therefore, no closed list of admissible evidence. Screenshots, emails and app messages all fall within this broad category, as long as they meet the requirements of form and reliability.

The same Code expressly recognizes the electronic document. Article 441 admits documents produced and stored in accordance with the specific legislation. Article 422 addresses mechanical reproductions: paragraph one provides that digital photographs and images taken from the internet serve as proof of what they depict, and paragraph three extends the rule to printed versions of electronic messages. The legislature anticipated today’s reality, in which much of the communication that matters is created and circulated digitally.

The practical consequence is straightforward. A screenshot of a conversation or a printed email is not rejected simply because it is digital. The sensitive point is not initial admission but how well the document holds up when the opposing party challenges it. That is the moment when authenticity and integrity decide the fate of the evidence.

Authenticity and Integrity: Where Screenshots Usually Fail

Authenticity answers a simple question: is the document really what it appears to be, and did it come from the person who is said to have sent it? Integrity answers another: has the content remained intact, without edits or cropping that distort its meaning? A standalone screenshot is fragile precisely because any user with basic skills can change text, fake senders or delete passages. Judges know this. That is why a screenshot by itself tends to carry little weight when its authenticity is challenged in a consistent way.

Article 422, paragraph one, of the Code of Civil Procedure solves part of the problem. If the digital image is challenged, the party that submitted it must provide the corresponding electronic authentication or, when that is not possible, submit the material to an expert examination (perícia). Article 411 complements this by treating a document as authentic when its authorship is identified through a lawful means of certification, including electronic ones. Digital evidence that goes unchallenged tends to prevail, but contested evidence needs technical reinforcement.

There is an important strategic detail. As long as the opposing party does not challenge authenticity, a private document enjoys a presumption in favor of the party that produced it. A generic challenge made only to buy time is usually insufficient. The challenger must point out specifically the defect that makes the file suspect, or the court may dismiss the objection.

If the digital image is challenged, the party that submitted it must provide the corresponding electronic authentication or, when that is not possible, submit the material to an expert examination.

The Notarial Record (Ata Notarial) as a Safeguard for Digital Evidence

The most solid tool for securing digital evidence is the ata notarial, a notarial record provided for in Article 384 of the Code of Civil Procedure. In this instrument, a notary (tabelião) accesses the content (an app conversation, a web page, an email inbox) and records in a public document exactly what he or she witnessed. The sole paragraph of the article allows data represented by image or sound and recorded in electronic files to be included in the record. The result is a document backed by public faith (fé pública).

The evidentiary gain is significant. The record does not certify that the content is true in itself, but it attests that, on a given date and time, that material existed and appeared in that form on the device or at the address accessed. This makes it much harder to claim later that the content was fabricated, because it places a public official, vested with public faith, as a qualified witness to the state of the information at that moment.

A word of warning about timing. The notarial record should be drawn up as soon as possible, while the content is still available and has not been deleted by the sender or removed from the platform. Conversations can be deleted, profiles deactivated and pages taken offline. Once the original content is lost, not even a notary can record what no longer exists, and the chance to secure the evidence slips away.

Metadata, Chain of Custody and Technical Preservation

Beyond the visible content, digital evidence carries hidden information of great value: metadata. It shows the date and time of creation, the originating number, the sender’s email address, the identification of the device and other data that help confirm where the file came from. An email, for example, contains technical headers that reveal the path the message took between servers. Preserving these elements is as important as keeping the text, because they are what support authenticity when it is challenged.

Safe preservation means keeping the file in its original format, not just an image of the screen. For app messages, the apps themselves let you export the complete conversation, with dates and the identification of the participants. For email, it is advisable to keep the message on the server and save the file with its headers intact. Whenever possible, calculating a verification code, known as a hash, makes it possible to show later that the file has not been altered in any way.

The logic of the chain of custody, consolidated in criminal procedure by the 2019 reform of the Code of Criminal Procedure, also offers a good benchmark for civil cases. The idea is to document each step from collection to presentation in court, so that no one can claim the material was swapped or tampered with along the way. Recording who collected the file, when, how and where it was stored strengthens the court’s confidence in the evidence.

Emails, Recordings and Messages: Specific Precautions

An email gains strength when accompanied by an electronic signature based on a digital certificate, since Brazilian law recognizes the legal validity of this type of signature. Without a certificate, the technical headers and confirmation from the provider can establish where the email came from. Simply pasting the text of an email into a document, without the original file or the header data, is the weakest form of presentation and the most exposed to challenge.

Recorded conversations deserve special attention. The higher courts recognize the lawfulness of a recording made by one of the participants in the dialogue, even if the other does not know he or she is being recorded, because a person who records his or her own conversation is not carrying out a clandestine interception. A different situation is a recording made by a third party who is not part of the conversation, which as a rule requires a court order. This distinction is decisive in determining whether the recording is admitted as valid evidence or discarded as unlawful.

App messages, in turn, call for extra caution about context. An excerpt cut out of a conversation can completely reverse the meaning of what was said. Good practice is to present the entire dialogue, with the date, time and clear identification of the participants, rather than selecting only the convenient sentences. The court gives far more weight to the full conversation, which shows the parties’ real intent, than to isolated fragments with no sequence.

Practical Steps to Preserve Digital Evidence

The difference between evidence that is accepted and evidence that is discarded often lies in the preparation. Before taking the material to court, a few simple precautions greatly increase the file’s reliability and reduce the room for challenge. The list below summarizes the recommended routine for screenshots, emails and app messages.

• Preserve the file in its original format, not just a photo of the screen, and keep the metadata whenever possible.
• Export the complete conversation from the app, with dates, times and the identification of the participants, with no selective cropping.
• Consider a notarial record (ata notarial) when the content is decisive or there is a risk that the other party will delete it.
• Document the chain of custody: who collected the material, when, how and where it was stored until it was filed.
• Act quickly, because messages, profiles and pages can disappear at any moment.

None of these measures alone guarantees victory in the case, but all of them reduce the risk that the evidence will be set aside over doubts about its origin. In disputes where one person’s word contradicts another’s, a well-preserved digital file is often the element that tips the court’s conviction to one side.

Frequently Asked Questions

Is a screenshot of a conversation enough as evidence on its own?

It works as an initial piece of evidence and may be enough when the opposing party does not challenge it. The problem arises when the opponent specifically questions its authenticity. In that case, the standalone screenshot tends to lose force, and the party will need to reinforce it with a full export of the conversation, a notarial record or an expert examination. The sooner the evidence is preserved, the better its chances of being accepted.

When is a notarial record worth getting?

A notarial record is advisable whenever the digital content is central to the case and there is a risk of deletion or challenge. Typical examples are incriminating conversations, social media posts, web pages and email inboxes. Because the notary records what he or she witnesses with public faith, the cost of the service is usually justified by the strength it gives the evidence.

What can I do to keep an email from being challenged?

The ideal is to preserve the message in its original format, with the technical headers that identify the sender, date and path between servers, rather than just copying the text. Electronic signatures with a digital certificate add security. When there is doubt about the origin, you can ask the court to request information from the provider. Keeping the file intact from the very first moment is the most effective protection against a challenge.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.