Practical guide

How to draft supplementary briefs under Art. 183 c.p.c. with AI

3 min read · Updated October 2026 · Editorial oversight: Avv. Federico Papa

Drafting supplementary briefs is a critical stage for defining the scope of the dispute and evidence in Italian civil proceedings. Following the Cartabia Reform, the consultation phase is now scheduled before the initial hearing, demanding strict adherence to deadlines and procedural bars.

In brief

Supplementary briefs under Art. 171-ter c.p.c. (replacing the former Art. 183 pleadings) consist of three digital filings to refine claims and evidence. The first brief (40 days before the hearing) is for emendatio libelli, the second (20 days) for direct evidence, and the third (10 days) for counter-evidence. Using edit.legal ensures logical consistency across filings and professional phrasing of evidentiary requests in compliance with Italian civil procedure.

The steps

1.
Verification of deadlines and backward calculation
The first step involves accurately calculating the backward deadlines from the initial hearing date. These are three mandatory terms of 40, 20, and 10 days. One must account for the summer suspension (sospensione feriale) and remember that for backward terms, if the deadline falls on a weekend or holiday, it is moved to the previous working day.
2.
Drafting the first brief: clarification
In this phase, the lawyer must clarify or modify previously formulated claims, defenses, and conclusions. While emendatio libelli (non-essential modification) is permitted, mutatio libelli (introducing entirely new claims) is prohibited unless it results from the opponent's defenses. The brief must punctually address the arguments raised by the counterparty in their initial appearance or summons.
3.
Drafting the second brief: direct evidence
The second brief serves two purposes: replying to new or modified claims and exceptions, and proposing direct evidence. It is vital to attach supporting documents and draft testimonial chapters in a specific, non-evaluative manner. edit.legal can assist in structuring these chapters based on the factual narrative to avoid findings of inadmissibility.
4.
Drafting the third brief: counter-evidence
The final brief is strictly limited to proposing counter-evidence in response to the evidentiary requests made by other parties in the second brief. It is not possible to introduce new investigative topics or exceptions; one may only list witnesses or documents aimed at refuting the opponent's deductions. Precision in linking the counter-evidence to the specific opposing chapter is essential.
5.
Consistency check and digital filing
Before filing, it is necessary to verify that there are no contradictions between the three briefs and the initial pleadings. Filing must occur exclusively through the Digital Civil Process (PCT), ensuring attachments are in text-searchable PDF format and that files do not exceed the system's size limits. edit.legal facilitates this final review by highlighting any argumentative gaps.

Legal basis: Art. 171-ter c.p.c.Art. 183 c.p.c.Art. 152 c.p.c.Art. 153 c.p.c.Art. 155 c.p.c.

Mistakes to avoid

Incorrect calculation of backward deadlines by failing to move the date back for holidays.
Including entirely new claims (mutatio libelli) instead of mere clarifications in the first brief.
Drafting testimonial evidence chapters that are generic or contain legal evaluations instead of facts.
Failing to specify which documents support individual evidentiary chapters.

Frequently asked questions

What happens if the deadline for the first brief is missed?

Failure to comply with mandatory deadlines results in the forfeiture of the right to perform the procedural activity. It will no longer be possible to modify claims or raise exceptions that the court cannot address sua sponte, except in cases of reinstatement (rimessione in termini) for causes not attributable to the party.

Is it possible to file documents with the third brief?

Yes, but only if the documents serve as counter-evidence against the evidentiary requests made by other parties in the second brief. Documents that could have been produced earlier cannot be filed at this stage.

How is the backward deadline calculated if it expires on a Saturday?

For backward deadlines, established case law dictates that if the term expires on a holiday or a Saturday, the deadline does not move forward but must be moved back to the first preceding working day.

Editorial oversight: Avv. Federico Papa·ICAMUpdated 1 October 2026Content drafted with AI support and subject to editorial source checks. Despite these controls, inaccuracies may remain: reports and rectification requests are welcome. Report a correction

What edit.legal automates

—Automatic analysis of the opponent's pleading to suggest rebuttal points for the first brief.
—Generation of draft testimonial evidence chapters based on the provided factual narrative.
—Verification of logical and documentary consistency across the three briefs to avoid procedural bars.