Barred and Biased Witnesses in Brazilian Civil Procedure: How to Object and How Much Weight the Testimony Carries

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Brazil’s Code of Civil Procedure distinguishes a barred witness from a biased one and attaches distinct effects to each. Knowing who falls into each category, the right moment for a formal challenge (contradita), and the consequences of false testimony helps you avoid losing decisive evidence during the evidentiary phase.

The general rule in civil procedure and the three exceptions

Witness evidence starts from a broad premise. Under Article 447 of the Code of Civil Procedure, anyone may testify as a witness, with three named exceptions: those who are incompetent, those who are barred, and those who are biased. The separation is not a mere question of terminology, because each group is treated differently when it comes to whether the testimony is admitted and how much weight it will carry in forming the judge’s conviction.

Incompetence goes to the person’s very ability to recount the facts. A bar arises from an objective tie between the witness and a party or the case, one that can be verified immediately. Bias, in turn, reflects a subjective compromise of impartiality, linked to feelings or interests that cloud the neutrality of the account. These are different layers of the same problem: the reliability of what will be said under questioning.

Understanding this triad matters in practice. A lawyer who confuses a bar with bias risks building the contradita on the wrong ground and seeing the challenge rejected. A party who overlooks the distinction may passively accept testimony that should have been taken unsworn, with a direct effect on the evidentiary force of the words presented at the hearing.

Who is a barred witness

The list of barred witnesses appears in the second paragraph of Article 447 and is objective in nature. Barred persons are the spouse, the domestic partner, relatives in the direct line (ascendants and descendants) in any degree, and collateral relatives up to the third degree of either party, whether by blood or by marriage. Family closeness presumes a compromise that needs no additional proof about the state of mind of the person testifying.

The bar also reaches anyone who is a party to the case and anyone who takes part in it on behalf of a party. This includes the guardian in a minor’s case, the legal representative of a legal entity, the judge, the lawyer, and everyone who assists or has assisted the parties. In all of these cases, the person’s procedural position or official duty rules out the disinterested witness that the system presupposes.

The law itself provides escape valves. The bar based on kinship yields when the public interest requires the testimony, or when, in a case concerning a person’s civil status, the evidence cannot be obtained any other way. Family law actions are an example: often only close relatives have direct knowledge of the disputed facts, which justifies hearing them despite the family tie.

In these exceptional situations, admitting a relative does not mean treating the account as equal to that of an ordinary witness. The testimony enters the record with the caveat that the judge will measure its reach in light of the existing tie, giving credit to points confirmed by other evidence and discounting whatever rests solely on the word of someone close to one of the parties.

Under Article 447 of the Code of Civil Procedure, anyone may testify as a witness, with three named exceptions: those who are incompetent, those who are barred, and those who are biased.

Who is a biased witness

Bias is addressed in the third paragraph of Article 447 and is subjective in nature. A biased witness is an enemy of the party, an intimate friend of the party, or anyone with an interest in the outcome of the dispute. Unlike a bar, it is not enough here to point to a degree of kinship or a procedural position: you must demonstrate the state of mind or the interest that compromises the neutrality of the account.

This difference has an important evidentiary consequence. Deep enmity, close friendship, and an economic or moral interest in the outcome of the case are not presumed. Whoever raises them must bring evidence of the relationship, such as messages, records, documents, or the witness’s own admission when questioned. Mere distrust, without a concrete basis, does not justify a finding of bias.

It is worth noting that the current Code trimmed the grounds found in the previous regime. Categories such as a person convicted of perjury and a person who, because of his habits, did not deserve to be believed were removed from the list. The legislature favored verifiable criteria and set aside generic moral judgments, confining bias to extreme emotional ties and to a direct interest in the dispute.

How and when to raise incompetence, a bar, or bias

The proper tool for challenging a witness is the contradita, provided for in Article 457 of the Code of Civil Procedure. The timing is strict: after the witness has been identified and before the testimony begins. Identification means taking the witness’s name, occupation, marital status, residence, and any relationship with the parties. The interested party must raise the challenge in that window, or lose the right to do so (preclusão).

The contradita may invoke incompetence, a bar, or bias. If the witness denies the facts alleged, the party may prove them with documents or with up to three witnesses presented at the same hearing and questioned separately. If the facts are acknowledged or admitted, the judge decides whether to dismiss the witness or to take the testimony as an unsworn informant (informante), depending on how useful the evidence is to the case.

The choice between dismissal and hearing the person as an informant belongs to the judge and follows a logic of necessity. When the challenged person is the only source of a relevant fact, the tendency is to admit the testimony unsworn, preserving the evidence, albeit with reservations. When other reliable witnesses can speak to the same point, dismissal tends to prevail, for the sake of efficiency and the neutrality of the evidentiary phase.

The effects of a finding: testimony without an oath

When a bar or bias is established and the testimony is nonetheless admitted, the central effect is that it is taken without the oath. The witness is heard as an informant. Article 447, in its final paragraphs, authorizes the judge to admit the testimony of minors and of barred or biased persons when necessary, giving it whatever value it may deserve in light of the evidence as a whole.

This is precisely where a bar and bias produce equivalent effects, even though they rest on different grounds. In both cases, the account does not receive the same presumption of credibility as that of a sworn witness. The judge is not bound by the informant’s word and tests it against documents, expert reports, and the other testimony, crediting what is corroborated and discarding what rests only on a compromised voice.

This discounting does not make the testimony useless. An informant’s statement becomes part of the record and can reinforce the judge’s conviction when it is consistent with other evidence. What changes is the burden of persuasion: the party who benefits from that account must anchor it in outside evidence, because the presumed neutrality that would have made reinforcement unnecessary was removed by the very status of a witness heard without an oath.

When a witness lies: the crime of false testimony

Before questioning, the witness swears to tell the truth about what he knows and is asked. Article 458 requires the judge to warn the witness that anyone who makes a false statement, or who stays silent about or conceals the truth, incurs criminal liability. This warning is not an empty formality: it marks the shift from a moral duty to a legal duty whose violation carries a specific criminal penalty.

Lying in court constitutes the crime of false testimony, described in Article 342 of the Brazilian Penal Code. The offense covers making a false statement, or denying or withholding the truth, as a witness, expert, accountant, translator, or interpreter in a judicial or administrative proceeding, a police investigation, or an arbitration. The penalty is imprisonment (reclusão) of two to four years and a fine, with the possibility of an increase in aggravated cases, such as when the offense is committed through bribery.

The legislature provided a way out. The act is no longer punishable if, before the judgment in the case in which it occurred, the offender retracts or states the truth. A timely retraction extinguishes criminal liability and encourages correcting the testimony while the evidence can still be reorganized, preventing the falsehood from contaminating the decision and harming the party injured by the false account.

The consequences of a lie, however, do not end in the criminal sphere. Testimony recognized as false loses its value in the case in which it was taken and may support a request to review decisions based on that evidence. For that reason, the strategy when facing a suspect account combines a timely contradita, a request to hear the witness without an oath, and, where appropriate, a report of the crime to the competent authority.

Frequently Asked Questions

What is the practical difference between a barred witness and a biased witness?

A barred witness has an objective tie to a party or to the case, such as close kinship, status as a party, or acting on someone’s behalf in the proceeding. A biased witness has a subjective compromise, linked to enmity, close friendship, or an interest in the dispute. A bar is shown immediately, through the relationship itself. Bias requires concrete proof of the state of mind or the interest. Despite these different origins, when admitted, both kinds of witnesses testify without an oath, and the judge freely measures the value of the account.

When must a party raise the contradita at the hearing?

The timing is specific and cannot be postponed. The contradita must be filed after the witness has been identified and before the testimony begins. That is the window in which the witness’s identity and any relationship with the parties become known. Letting that opportunity pass results in loss of the right to object (preclusão), and the challenge is no longer allowed. For that reason, it is wise to review the witness list in advance, anticipate possible ties, and have documents or up to three witnesses ready to support the contradita at the hearing itself, in case the person denies the facts.

What happens to the testimony of someone who lies in court?

Lying in court can constitute the crime of false testimony, punishable by imprisonment of two to four years and a fine, in addition to an increase in aggravated situations. Procedurally, an account recognized as false loses its evidentiary value and may support a review of decisions that relied on it. There is, however, a way out: if the witness retracts or states the truth before the judgment in the case in which he testified, the act is no longer punishable, which encourages timely correction of the testimony.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.