Court-appointed expert and party-appointed expert for the parties: technical evidence handled with method at every phase, from the first review of the evidence to supporting the report at the hearing.
Court-appointed expert registered with the courts of justice of Amazonas (TJAM), Bahia (TJBA), the Federal District (TJDFT), Minas Gerais (TJMG), Paraíba (TJPB), Paraná (TJPR), Rio Grande do Sul (TJRS), Santa Catarina (TJSC) and São Paulo (TJSP, no. 147), and with the 2nd and 3rd Region Labour Courts (TRT).
A judicial forensic examination takes place inside the lawsuit. The court appoints an impartial expert to produce the official report, and each party may retain its own party-appointed expert to draft questions to the expert, attend the examinations and file a technical opinion. This is the ground on which technical evidence decides legal arguments: whoever arrives without a party-appointed expert watches from the outside.
An out-of-court forensic examination is carried out at the client's initiative, without depending on a judge. It serves to establish what you actually have before acting (pre-examination), to build the evidence that will support a future claim (pre-constituted evidence), to investigate a fact internally (private or administrative forensic examination) or to underpin a negotiation. Many disputes end right here, without ever becoming a lawsuit.

Party-appointed expert work: questions to the expert, attendance and submissions. Every phase missed is evidence that hardens.
Pre-examination: feasibility review of the evidence before spending on litigation.
Administrative forensic examination: a methodical enquiry, so that the decision holds up later.
Technical opinion for negotiation: proven facts change the balance of a settlement.
Whoever lets the 15 days from the appointment lapse enters the examination with no questions of their own and with no technical eyes on the examinations. Whoever lets the 15 days from the report lapse watches the evidence harden without technical challenge. The role of the party-appointed expert is to fill each of those windows with content the court must take into account.
On a court appointment, the procedure is the one laid down in the CPC: the expert submits a fee proposal, a curriculum vitae and contact details (art. 465, §2); the parties may comment on the proposal (§3); the court fixes the amount and may authorise an advance payment of part of the fees at the start of the work (§4). Who bears the cost follows the procedural rules: as a rule, the party that applied for the examination pays the advance, and the final allocation follows the outcome of the case.
The party-appointed expert, in turn, is paid by the party that nominates them (art. 95), outside the court's fee assessment.
In retained work (party-appointed expert work, technical opinion, pre-examination, out-of-court forensic examination), the proposal is drawn up case by case, after the feasibility review. The factors that weigh in are: the volume of material to be examined, the technical complexity, the procedural deadlines, examinations and travel, and any support required at a hearing.
There is no public price list, because no two cases are alike: the scope is agreed in writing before the work begins, at a fixed fee or at an hourly technical rate.
The forensic examination deadlines under the CPC, the checklist for preserving digital evidence and the golden rules for questions to the expert, in one document to keep and use on the next case.
See also
For Lawyers → Expert Reports and Opinions → Computer Forensics →
Engagement as party-appointed expert. Forensic analysis of the electronic signature platform revealed flaws in the authentication process, grounding a favourable decision at first instance.
Technical consultancy and participation as a specialist in interviews for Record TV, SBT, Rede TV, Band and TV Cultura.
Before deciding, it is worth seeing what has already come through this laboratory: cases described without identifying the parties, in the format of challenge, method and result.
The intruder's control channel was written into smart contracts. The examination decoded what he had deleted and handed the authorities concrete routes to identification.
See the case Negative proofThe official examination had concluded that he took part. The re-examination showed the links were false positives, and the accused person was cleared.
See the case