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Court Examination · Private Examination · Party-Appointed Expert · Technical Opinion

When the case rests on technical evidence

VALLIM Perícias brings together ten forensic units under one international methodology and a documented chain of custody, for those who cannot get the technical evidence wrong.

Technical responsibility: Adriano Vallim, forensic expert with 25 years of practice
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Method · Technique · Evidence
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Technical lead

A complete forensic structure. One name answering for it.

With more than 25 years of forensic practice in computer forensics, forensic handwriting examination, questioned document examination and forensic phonetics, Adriano Vallim specialises in digital crime and is a national reference in producing technical evidence with legal standing. A court-appointed expert registered with 9 state Courts of Justice and with the TRTs (Labour Courts) of the 2nd and 3rd Regions, he served as an ad hoc expert at the 4th D.I.G. (Economic and Property Crimes by Electronic Means) of DEIC/SP, and works with methodological rigour and technical independence on highly complex cases for law firms, companies and public institutions.

A postgraduate lecturer at Universidade Presbiteriana Mackenzie and author of the book Forense Computacional e Criptografia (Editora SENAC), he combines academic depth with decades of practical work in court disputes, corporate investigations and digital crime examinations. He served as a Cellebrite Certified Instructor for Latin America.

See the full career →

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SEAL · AUTHENTICITYVALLIM · 2026
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years of experience in forensic examination and 30 years of career in technology
state Courts of Justice in which he serves as a court-appointed expert
book published by Editora SENAC, also available as an eBook
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interviews given to TV programmes, radio stations and podcasts
Forensic Units

Ten units. One technical lead.

The data on the device, the stroke on the paper, the voice in the recording and the image in the video rarely show up alone in the same case. Here they all go through the same method, the same chain of custody and the signature of the person who answers for them in court.

/01

Court and Private Examination

Technical evidence with legal standing, as a court-appointed expert or as a party-appointed expert.

 /02

Computer Forensics and Digital Investigation

Examination of devices, systems and digital environments under a strict chain of custody.

 /03

Forensic Data Recovery

Data recovered from damaged or erased media, with the chain of custody that sustains it as evidence.

 /04

Handwriting and Questioned Document Examination

Technical examination of physical and digital documents, signatures and personal identification with legal standing.

 /05

Forensic Phonetics

Speaker comparison, authenticity of recordings and detection of voices cloned by artificial intelligence.

 /06

Audiovisual Examination

Authenticity of video and images, deepfakes, photogrammetry and examination of CCTV recordings.

 /07

Information Security and Compliance

Forensic examinations and audits in corporate environments, from internal fraud to technology contracts.

 /08

IT Arbitration and Mediation

Resolution of technology disputes: mediation recognised by the CNJ (National Council of Justice) and forensic technical support in arbitration chambers.

Does your case call for another kind of examination?

Digital questioned document examination, electronic signatures, mobile phone extraction, examination of messaging app conversations and more.

See all forensic units →
Forensic Laboratory

Own facility, controlled environment

Collection and preservation under ISO/IEC 27037, write blockers, hardware-based forensic extraction and duplication for the creation of forensic images, and full documentation of the chain of custody, in specialised units with restricted access.

Data Lab

Computer Forensics

Extraction and analysis of devices, data recovery, clean room with laminar flow cabinet and dedicated examination stations.

Doc Lab

Documents and Signatures

Handwriting and questioned document analysis of physical and digital documents, with specialised optical instruments.

Phonetics

Audio and Voice

Analysis of recordings, speaker identification and examination of audiovisual content, including deepfakes.

Clean Room I: read/write head swap using a donor drive
DATA LAB · Clean Room I Head swap · donor drive
Clean Room II: laminar flow cabinet and precision bench
DATA LAB · Clean Room II Laminar flow cabinet

See the laboratory in detail →

Confidentiality Confidentiality at every stage of the work
NDANon-disclosure agreement signed before any analysis
LGPDLGPD (Brazil's data protection act) applied to the forensic work itself
CustodyPhysical and logical custody protocols for the evidence, in a controlled environment
SecrecyProfessional secrecy maintained even after the engagement ends
Areas of work

Your dispute, translated into technical evidence

// specialised in serving law firms and companies, with the technical and legal alignment that the strategy of the case demands

How I work

Six steps, one chain of custody

Every stage is documented. What enters the laboratory leaves as evidence that withstands challenge by the opposing party.
01

Initial case assessment

Free consultation to understand the nature, the objectives and the available evidence.

02

Technical and commercial proposal

Scope, methodology, deadlines and fees. Non-disclosure agreement (NDA) before any analysis.

03

Forensic collection

ISO/IEC 27037, write blockers, forensic images and documented custody.

04

Technical analysis

Controlled laboratory, with forensic tools recognised by the Public Prosecutor's Office and by international bodies.

05

Delivery of the expert report

A clear, objective and legally robust report, signed with ICP-Brasil.

06

Post-report support

Clarifications, participation in hearings and supplementary statements.

See the method and the chain of custody in detail →

Methodology

Internationally recognised methodology

Every stage of the forensic work follows international technical standards and the applicable procedural law, so that the evidence produced withstands challenge here and abroad.

National scope Standards recognised by Brazilian law Technical standards and legislation governing forensic evidence produced in Brazil
ISO/IEC 27037Identification, collection, acquisition and preservation of digital evidence
ISO/IEC 27041Assurance of the suitability of investigative methods
ISO/IEC 27042Analysis and interpretation of digital evidence
ISO/IEC 27043Incident investigation principles and processes
CPP Art. 158-AChain of custody in criminal proceedings (CPP, Brazilian Code of Criminal Procedure)
CPC Art. 156 et seq.Expert evidence in civil proceedings (CPC, Brazilian Code of Civil Procedure)
Marco Civil / LGPDLegislation applied to digital evidence
NIST / SWGDETechnical references for forensic procedure and media examination, adopted in Brazilian forensic practice
International scope Evidence that crosses borders Laws and standards applicable in each region, in cases with operations outside Brazil
GDPREuropean Union, including Portugal, in cases involving data of European subjects
eIDASValidity of electronic signatures in contracts with parties in Europe
PIPEDA / Law 25Canada, with the specific rules of the province of Quebec
CCPA / HIPAAUnited States, in incidents involving personal and health data
LATAM data lawsArgentina, Chile, Uruguay, Paraguay and Mexico, in operations across the region
ISO/IEC 27050Electronic discovery (e-Discovery) in cross-border litigation and investigations
Media

The specialist the press turns to

A regular presence on the country's main broadcasters, explaining in plain language the technical background of the most widely reported cases.

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Record TV · Domingo EspetacularJornal da RecordBalanço GeralHoje em DiaBand · Jornal da BandSBT · Primeiro ImpactoChega MaisTV CulturaTV Câmara
Record · Fala Brasil · live

Fraud using voices cloned by artificial intelligence
Band · Brasil Urgente · live

How the extraction device used by the police works
Record · Domingo Espetacular

Teenager loses his life after falling in love with an artificial intelligence

The technical evidence your case needs. The authority the court respects.

Free initial feasibility consultation. Reply within 24 hours on business days.
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