The initial petition constitutes the introductory and indispensable procedural act for invoking jurisdictional protection within the Brazilian legal system, materializing the constitutional right of action provided for in Article 5, item XXXV, of the Federal Constitution. Within the scope of Civil Procedural Law, it acts as the instrument that delimits the objective elements of the litigation — parties, cause of action, and request —, establishing the contours of the jurisdictional provision and inaugurating the procedural relationship between the State-judge and the litigants.
1. Concept and Legal Nature
The initial petition is the formal and solemn act by which the plaintiff exercises the public, subjective, and abstract right of action, provoking the jurisdictional activity of the State, which, by virtue of the principle of inertia (nemo judex sine actore), cannot act ex officio in the protection of subjective rights. Its legal nature is that of a procedural act of the party, specifically an act of postulation, which serves as a vehicle for the claim.
The "initial petition" (instrument) is differentiated from the "claim" (content). While the claim is the substantial act of requesting jurisdictional protection, the initial petition is the document that embodies it. It fulfills a triple function: (i) it sets the limits of the litigation, (ii) it interrupts the statute of limitations (under the terms of Art. 240 of the CPC), and (iii) it establishes the adversarial principle, guiding the defendant's defense.
2. Historical Evolution and Comparative Law
Historically, the initial petition dates back to the libellus of late Roman Law, evolving into the libellus conventionis in the extraordinary period. In Portuguese law, the Philippine Ordinances already provided for the need for a clear exposition of the claim so that the judge could render a sentence.
In Brazil, the 1939 Code of Civil Procedure maintained an exacerbated formalist rigor. The 1973 Code, under the influence of Enrico Tullio Liebman's school, systematized the requirements of the initial petition in Article 282. The current 2015 Code of Civil Procedure (CPC/15) promoted a paradigmatic transition to so-called neo-proceduralism, prioritizing the primacy of the judgment on the merits over excessive formalism. In Comparative Law, a similar trend is observed in the French Code de Procédure Civile and the United States Federal Rules of Civil Procedure, where the complaint must provide "fair notice" of the claim.
3. Legal Basis and Structural Requirements
The normative discipline of the initial petition is primarily found in Articles 319 to 331 of the Code of Civil Procedure (Law No. 13,105/2015). To be admitted, the document must meet intrinsic and extrinsic requirements:
- Art. 319, I and II: Addressing to the competent court and complete qualification of the parties.
- Art. 319, III: The causa petendi (cause of action), subdivided into facts and legal grounds. Brazil adopts the substantiation theory, requiring a detailed exposition of the facts constituting the right.
- Art. 319, IV: The request, which must be certain and determined (Art. 322 and 324).
- Art. 319, V: The value of the cause, a public order requirement that sets the boundaries for competence, costs, and fines.
- Art. 319, VII: The plaintiff's option regarding the holding of a conciliation or mediation hearing.
- Art. 320: Instruction with documents indispensable to the filing of the action.
4. Practical Application and Consolidated Jurisprudential Understanding
Current jurisprudence, notably from the Superior Court of Justice (STJ), reinforces the Principle of the Primacy of Judgment on the Merits (Art. 4 and 6 of the CPC). The consolidated understanding prohibits the summary dismissal of the initial petition without first giving the plaintiff the opportunity to amend it (Art. 321, CPC).
Regarding the value of the cause in moral damages lawsuits, the STJ has established that, after the CPC/2015, the plaintiff must indicate the intended value in the initial petition, and generic requests are no longer admitted when immediate quantification is possible. Another relevant point is the stabilization of the claim: after service of process, the plaintiff cannot alter the request or the cause of action without the defendant's consent; after the case management phase, the alteration is prohibited even with consent (Art. 329, CPC).
The Supreme Federal Court (STF), in the context of constitutionality control and extraordinary appeals, reiterates that the initial petition in collective actions or concentrated control actions must observe strict thematic relevance, under penalty of dismissal due to illegitimacy or ineptitude.
5. Related Principles and Doctrinal Divergences
The institute is governed by fundamental principles:
- Principle of Cooperation (Art. 6, CPC): The magistrate has the duty to consult the party regarding defects in the initial petition before dismissing the case.
- Principle of Congruence or Adstriction (Arts. 141 and 492, CPC): The judge must decide within the limits in which the initial petition was proposed, with extra, ultra, or citra petita decisions being prohibited.
Doctrinally, there remains a debate about the assertion theory (in statu assertionis). For the majority current, the conditions of the action (legitimacy and interest) must be assessed by the judge in light of what was narrated in the initial petition, without deep incursion into the evidence, under penalty of confusing them with the merits of the case itself.
6. Contemporary Relevance and Impacts on the Legal System
In contemporary times, the initial petition faces the challenges of procedural digitalization and jurimetrics. The structuring of the initial petition into standardized templates and the use of artificial intelligence tools for the screening of initial petitions (such as the Victor Project at the STF) have modified forensic practice.
The practical impact of a deficient initial petition is the dismissal of the case without resolution of the merits (Art. 485, I, CPC) or the rejection of the initial petition (Art. 330, CPC). However, the current trend is procedural flexibility and the utilization of procedural acts, provided that the adversarial principle and full defense are respected. The initial petition ceases to be a mere form to become a strategic project for conflict resolution, requiring technical precision and argumentative clarity from the lawyer.
Legal and Jurisprudential References
- BRAZIL. Constitution of the Federative Republic of Brazil of 1988. Art. 5, XXXV.
- BRAZIL. Law No. 13,105, of March 16, 2015. Code of Civil Procedure. Articles 319 to 332.
- BRAZIL. Superior Court of Justice. Súmula 326: "In an action for compensation for moral damages, the conviction in an amount lower than that requested in the initial petition does not imply reciprocal succumbency" (interpretation maintained under the perspective of appellate interest).
- BRAZIL. Superior Court of Justice. REsp 1.842.711/RS. Rel. Min. Nancy Andrighi. (Deals with the need for amendment to the initial petition and the magistrate's duty of prevention).
- DIDIER JR., Fredie. Course on Civil Procedural Law. Vol. 1. Salvador: JusPodivm, 2023.
