The Latin expression ad cautelam, translated literally as "as a precaution" or "by way of caution," designates the legal institute used to substantiate procedural acts or judicial decisions carried out with the objective of preventing nullities, avoiding the loss of rights, or ensuring the effectiveness of future provisions, even when the immediate necessity of the measure may be subject to doctrinal or jurisdictional questioning. In the Brazilian legal system, it manifests predominantly in Civil, Criminal, and Administrative Procedural Law, serving as a safeguard for legal certainty and procedural economy.
1. Definition, Concept, and Legal Nature
The term ad cautelam constitutes a Latin locution that permeates legal praxis to indicate that a specific act is performed out of precaution. Conceptually, it refers to the conduct of a magistrate, administrator, or attorney who, faced with factual or legal uncertainty, chooses to adopt a measure that preserves the integrity of the proceedings or the substantive right under discussion.
The legal nature of the institute is that of an exclusionary and preventive measure. It is not strictly confused with urgent relief (tutelas de urgência), although it dialogues with them, as the ad cautelam act is often performed ex officio by the judge to sanitize the process or avoid future claims of nullity (pas de nullité sans grief). It is a manifestation of the general power of caution and the duty of diligence inherent to the jurisdictional and administrative function.
2. Historical Origin and Evolution
Historically, caution in Law dates back to Roman Law, specifically in the cautiones, guarantees required to ensure the fulfillment of obligations or the preservation of assets during litigation. It evolved from rigid formalism to a functional meaning in European Common Law and, subsequently, in Civil Law systems.
In Brazil, the evolution of the term followed the transition from the 1939 Code of Civil Procedure to the 1973 Code, consolidating itself in the 2015 CPC under the aegis of the primacy of merits-based judgment and procedural cooperation. Contemporary evolution has shifted the focus from mere formal prudence to a tool for efficient procedural management, aiming at speed and the prevention of procedural setbacks.
3. Legal Provision and Positive Foundation
Although the expression ad cautelam is not textually written in codified legislation, its foundation derives from several provisions that authorize preventive action:
- Code of Civil Procedure (Law No. 13.105/2015): Art. 139, item IV, establishes the police power and the direction of the process, allowing the judge to determine inductive, coercive, and mandatory measures necessary to ensure compliance with a court order. Art. 294 and following, which deal with provisional relief, offer the legal support for measures based on caution.
- Code of Criminal Procedure (Decree-Law No. 3.689/1941): Art. 319 lists precautionary measures other than imprisonment, applicable ad cautelam to ensure the application of criminal law and the investigation.
- Law No. 8.112/1990 (Single Legal Regime): Art. 147 provides for the preventive removal of a public servant (ad cautelam) so that they do not influence the investigation of irregularities in an administrative disciplinary process (PAD).
- Federal Constitution: It is based on Art. 5, item LXXVIII, which guarantees the reasonable duration of the process and the means that ensure the speed of its processing, justifying preventive acts to avoid unnecessary repetitions.
4. Practical Application and Consolidated Jurisprudence
The application of the ad cautelam principle is vast and strategic in the Superior Courts:
4.1. In the Superior Court of Justice (STJ)
The STJ has decided that the interrogation of the defendant, even in cases of default or when there is doubt about the necessity of the act, must be performed ad cautelam to avoid nullity due to restriction of defense. In HC 826.432/SP, it was reinforced that the adoption of procedural precautions by the magistrate does not imply a premature value judgment, but rather zeal for due process of law.
4.2. In the Supreme Federal Court (STF)
The STF frequently uses the expression in monocratic decisions to suspend the effects of laws or administrative acts in the context of constitutional control (ADIs and ADPFs). The ad cautelam suspension aims to prevent the validity of an apparently unconstitutional norm from producing irreversible damage while the plenary does not decide the merits (e.g., ADI 7.358).
4.3. In the Superior Labor Court (TST)
In the labor field, the term is common in the filing of appeals. Lawyers file "ad cautelam" petitions to interrupt deadlines or ensure timeliness in the face of instabilities in electronic filing systems, an understanding frequently accepted under the prism of procedural good faith.
5. Related Principles and Doctrinal Divergences
Acting ad cautelam is intrinsically linked to the following principles:
- Principle of Instrumentality of Forms: The act, even if performed without strict immediate legal requirement, is valid if it achieves its purpose without causing prejudice.
- Principle of Legal Certainty: It aims to stabilize relationships and avoid contradictory or null decisions.
- Precautionary Principle (Environmental Law): Although distinct, the procedural ad cautelam maintains symmetry with environmental precaution, where the absence of absolute scientific certainty should not be used as a reason to postpone protection measures.
Divergences: Critical doctrine warns of the risk of "abusive use of caution," where magistrates could use the term to issue decisions without due exhaustive reasoning, delaying the merits. Part of the procedural doctrine maintains that the excess of ad cautelam acts can violate procedural speed, transforming the exception into a technical rule of delay.
6. Contemporary Relevance and Practical Impacts
Currently, the relevance of the ad cautelam institute has been accentuated by the digitization of processes and the complexity of Digital Law. The anticipated production of evidence in virtual environments is frequently performed ad cautelam due to the volatility of data. In the field of Compliance and sanctioning Administrative Law, ad cautelam measures for the suspension of contracts or removal of managers are vital for the protection of the public treasury before the final judgment, provided that proportionality is respected.
Legal and Jurisprudential References
- BRAZIL. Law No. 13.105, of March 16, 2015. Code of Civil Procedure.
- BRAZIL. Decree-Law No. 3.689, of October 3, 1941. Code of Criminal Procedure.
- BRAZIL. Supreme Federal Court. ADI 7.358 MC/DF. Rapporteur: Justice Edson Fachin. Judgment in precautionary context.
- BRAZIL. Superior Court of Justice. Habeas Corpus No. 826.432/SP. Rapporteur: Justice Laurita Vaz, Sixth Panel.
- NERY JUNIOR, Nelson; NERY, Rosa Maria de Andrade. Código de Processo Civil Comentado. 17th ed. São Paulo: Thomson Reuters Brasil, 2018.
- THEODORO JÚNIOR, Humberto. Curso de Direito Processual Civil. Vol. I. Rio de Janeiro: Forense, 2023.
