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Forensics without borders: technical evidence when the case crosses countries

Assisted remote collection, LGPD and GDPR, e-Discovery, and the Tri-Border Area: the method that makes evidence travel.

International · April 15, 2026 · 8 min read

Technical evidence that crosses borders: forensic work in international cases

Modern litigation carries no passport. The Brazilian company disputes with the European supplier; the executive is investigated by the American headquarters; the couple divorces with assets and messages scattered across two continents; the scam launches from one country, passes through another, and drains the account in a third. In all these scenarios, someone must produce technical evidence that works in more than one jurisdiction, and discovers that the challenge is not just legal: it is logistical, regulatory and, above all, methodological.

What crosses the border is the method

The good news is that forensic technique speaks a common language. The standards governing digital evidence (the ISO/IEC 27037 family and related standards, plus procedural references such as NIST and SWGDE) are international by nature: the forensic image, the hash, the documented chain of custody, and the reproducible examination are requirements recognizable by a court in Sao Paulo, an arbitrator in London, or an auditor in New York. A report produced under that standard does not need to be redone at each border; at most, it needs to be translated and contextualized. That is why the most important decision in an international case is made on day one: preserve the evidence to the most demanding standard among the jurisdictions involved, not the most comfortable.

"Each country has its law, its language, and its court. The hash is the same in all of them. Evidence born with method travels; evidence born improvised does not make it past the first border."

Assisted remote collection: the laboratory goes to the evidence

Not all evidence can travel, and not every case allows immediate travel. The assisted remote collection model resolves most scenarios: the laboratory conducts the procedure at a distance, guiding step by step an authorized person on site (the branch's IT employee, local counsel, the party itself), with proper tooling, a documented session, integrity verification by hash at the source, and a complete record of the procedure. What requires physical presence (the damaged media, the examination of the paper document, the formal proceeding) is organized as a targeted mission, planned from Brazil. Between the two extremes, the typical case combines the models: what is urgent is preserved remotely, and travel is reserved for what is irreplaceable.

The regulatory clock on each side

Personal data crosses borders under legal escort. On the Brazilian side, the LGPD; on the European side, the GDPR; and between them, international transfer rules that the design of the examination must respect from the collection onward: minimization (collect what is necessary, not what is available), a documented legal basis and, often, the examination conducted where the data resides, with only the result crossing the border. In disputes with American companies, the vocabulary changes to e-Discovery, and the technical reference is ISO/IEC 27050: defensible preservation, negotiated scope, and documented production. The expert who masters both vocabularies avoids the classic mistake of treating a foreign request with Brazilian informality, or vice versa.

The physical border: documents that circulate between countries

There is also the internationalization of paper. In the Tri-Border Area and in migratory flows, contracts, powers of attorney, identity documents, visas, and certificates of diverse origins circulate, and with them the forgeries that feed migratory, commercial, and asset fraud. The handwriting and document examination of these materials demands familiarity with the documentary standards of more than one country and a dialogue with the digital layer: the physical document presented on one side of the border was often born from an electronic file on the other side. The combination of the two examinations, of the paper and of the data, is what closes these cases.

A typical case, three countries

The abstract design comes to life in a recurring scenario. The European parent suspects fraud at the Brazilian subsidiary; the emails are in an American cloud; the suspect's laptop is in Sao Paulo; potential litigation, in two jurisdictions. Day one defines everything: remote preservation of the mailboxes through the corporate channel, with minimal scope and a formal record of authorization; a forensic image of the laptop in Brazil, with local custody; and the map of deadlines, from the American providers to the European response obligation. The examination runs in Brazil on the data that can be here, and where the law commands, the examination goes to the data, with only conclusions and authorized samples crossing the border. In the end, a single report, in two languages, sustains the termination for cause in Brazil and the damages action in Europe, without either jurisdiction being able to accuse the evidence of having been born outside the rules. Is it laborious? It is. But improvisation, in these cases, does not come cheaper: it comes back challenged.

What to verify before starting an international case

  • Where the evidence physically resides, and under which country's data protection law;
  • Which jurisdiction will decide the merits, and what evidentiary standard it practices;
  • Whether collection can be assisted remotely or requires presence, and with what local authorization;
  • Provider retention periods in each country involved: the clock runs in different time zones;
  • The language of the report and the need for a translated version with correct technical terminology.

International work is not an exotic version of forensics; it is the same forensics with more variables and less room for improvisation. The case that crosses countries multiplies clocks, laws, and interlocutors, but the backbone does not change: preserve early, to the highest standard, with documented custody and a method any court recognizes. This site's .eu domain is no accident: it is the declaration that the evidence produced here was designed, from its origin, to cross borders standing.

VALLIM

Adriano Vallim

Forensic expert specializing in digital crimes, working across computer forensics, handwriting and document examination, and forensic phonetics. He combines technical, academic and institutional credentials that place him among the most complete references in the field in Brazil. See the full background →

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