CTU and CTP: Italy's two kinds of technical expert
Two near-identical acronyms, two different jobs. Confusion between the court’s expert and the party’s expert is understandable outside Italian courtrooms and frequent inside them, and it produces concrete mistakes: late appointments, unbudgeted costs, expert operations faced alone. This page sets out who does what, when, and at whose expense.
The CTU: the judge's auxiliary
The consulente tecnico d’ufficio is a professional the judge appoints when the decision requires knowledge the law does not supply: valuing a property, reconstructing a network intrusion, establishing whether a signature is genuine. Neither witness nor arbitrator, the CTU is an auxiliary of the court: they answer questions framed by the judge, take an oath, and are held to impartiality — they can be challenged on the same grounds as a judge. Appointments are drawn from a register of technical consultants, now organised as a national electronic roll with categories and admission requirements set by decree. On paper the CTU’s report does not bind the judge; in practice a well-made court expertise steers the decision more than any other piece of evidence — which is why it must be followed while it is being formed, not contested after the fact.
The CTP: the party's technician
The consulente tecnico di parte is appointed by a party — normally through counsel — to protect its interest on technical ground. The CTP takes no oath and owes no impartiality, and this is not a defect: it is the design. Proceedings run on adversarial confrontation, and technical confrontation only exists if each side has someone able to sustain it. The CTP attends the court expert’s operations, files observations and requests the report must account for, discusses the draft conclusions within the set deadlines — and earlier still, often their greatest contribution, helps counsel judge whether the technical case holds, what documents to demand, how the questions to the expert should be framed.
No register is required for the role: the choice is free and turns on specific competence. What a party-appointed expert does concretely in digital matters is described on the page dedicated to the role.
How they interact: the expert operations
The two roles meet in the expert operations: the inspections, acquisitions and examinations the CTU conducts on notice to the parties’ experts. That is where technical evidence is formed, and where the CTP’s presence changes outcomes: an objection on method raised while a device is being acquired weighs heavily; the same objection raised months later against a filed report weighs little. In digital matters this is truer than anywhere else, because the operations are often unrepeatable — a live system, an active account, volatile data cannot be examined twice. After the draft report, the parties’ experts file written observations and the CTU must respond. A good party report is not a counter-narrative: it is a list of verifiable points — what was measured, what is missing, what does not follow from the premises — written so the judge can check each one unaided.
Criminal proceedings: same roles, different names
In criminal procedure the vocabulary shifts and breeds confusion: the expert appointed by the court is called perito, and “consulente tecnico” denotes precisely the parties’ experts — of the prosecution, the accused, the injured party. Parties may appoint their consultants when an expertise is ordered, but also outside one, for technical defence investigations. The substance does not change: one expert of the court, bound to impartiality, and the parties’ experts guarding the adversarial process.
The costs, role by role
The CTU’s fee is not set by the market: the judge liquidates it on statutory tables, an advance is charged to one or more parties at appointment, and in the final decision the cost normally follows the loser-pays rule. The CTP is a private engagement: paid by the appointing party at agreed rates, recoverable among litigation expenses if the case is won and the consultancy was necessary to the defence — not automatically, so keep the engagement letter and invoices. For orders of magnitude and how to read a quote, see how much a digital forensics report costs.
The scheme at a glance
- Appointed by — CTU: the judge. CTP: the party.
- Answers to — CTU: the court, on the court’s questions. CTP: the appointing party.
- Impartiality — CTU: mandatory, with oath and grounds for challenge. CTP: not required; the role is openly partisan.
- Register — CTU: drawn from the consultants’ roll. CTP: the party’s free choice.
- Paid by — CTU: advance on the parties, then normally the losing side. CTP: the appointing party, with possible recovery on victory.
- When to appoint — CTU: when the court orders one. CTP: as soon as the technical issue emerges — before the expert operations, ideally before the pleadings.