One partner borrowed money. The other partner cross-examined him. Court said: yes.
In a fight between two managing directors of the same firm, the court ruled that an adverse party can cross-examine a co-director. This confirms cross-examination is adversarial—and a warning for experts who stray beyond their sandbox.
Cross-examined.
Same firm.
Adverse party.
In a fight between two managing directors of the same firm, the court ruled that an adverse party can cross-examine a co-director. This confirms cross-examination is adversarial—and a warning for experts who stray beyond their sandbox.
Party A took a loan for the firm. Party B didn't consent. So Party B got to cross-examine Party A in court—even though they were both directors. Two men who ran the same company sat on opposite sides of a table. One had borrowed money in the firm's name. The other had not agreed to the loan. Now the second man was about to question the first—not as a colleague, but as an adversary.
The question that hung over the case was deceptively simple: could one managing director cross-examine another managing director of the same firm, simply because they disagreed on a business decision? The answer would reshape how every expert witness, every co-director, and every lawyer understands the word "adversary."
This is not a question about corporate etiquette. It is a question about the fundamental architecture of a trial. Cross-examination is the engine that drives the adversarial system. It is the mechanism by which one party tests the truthfulness, accuracy, and reliability of another party's evidence. But what happens when the witness and the cross-examiner share the same boardroom? What happens when the person asking the questions and the person answering them both signed the same partnership deed?
The case of B.S. Balaji v. T. Govindaraju provides an answer. And that answer has consequences far beyond the two men who brought the dispute to court.
When the loan split the boardroom
The firm had two managing directors. Party A, acting in his capacity as managing director, borrowed money on behalf of the firm. Party B did not consent to this loan. The loan agreement sat on the table, signed only by Party A. The money was taken, the firm was bound, and the relationship fractured.
When the matter reached court, Party A was called as a witness. Party B wanted to cross-examine him. The courtroom fell silent as Party B rose to cross-examine. The objection was immediate: both men were managing directors of the same firm. How could one director cross-examine another?
The objection was not frivolous. In Indian civil procedure, a party who is called as a witness by the opposite side is subject to cross-examination. But Party A was not called by Party B. Party A was called as a witness—presumably by his own counsel or by the court. The question was whether Party B, a co-director, could claim the right to cross-examine a witness who was, technically, his business partner.
Party B argued that he was an adverse party—someone whose interests directly opposed the witness's position. He had not authorised the loan. He had not consented to the borrowing. The firm's liability was now his liability, and he had never agreed to it. That, he said, gave him the right to test Party A's testimony through cross-examination.
The air in the courtroom was thick with procedural tension. The counsel for Party A objected vigorously: "My client is a managing director of the same firm. How can the other managing director cross-examine him? They are on the same side of the corporate structure." The counsel for Party B countered: "Corporate structure is not the same as adversarial structure. We are on opposite sides of this loan."
The judge listened. The file on the desk was thin—just a few pages of pleadings and the loan document. But the legal question was weighty. The bench had to decide whether the corporate relationship between the two men erased the adversarial relationship created by the disputed loan.
The court's answer: yes, you can
The Court agreed with Party B. The bench observed that "the party who has a right to take part in any inquiry or trial can cross-examine the witness or witnesses." The key word was "adverse." Party B was not just a co-director. He was an adverse party—someone whose legal position was directly opposed to the witness's version of events.
The court concluded that Party B, the later managing director and the adverse party, had the right to cross-examine Party A. The judge's pen hovered over the order sheet as the ruling was pronounced. The fact that they shared a directorship did not erase the adversarial relationship. Cross-examination, the court confirmed, is inherently adversarial. It is a weapon designed to attack an opponent's witness, not a polite conversation between colleagues.
The impact of this ruling extends far beyond the two directors. For expert witnesses, the message is sharp: if you stray beyond your professional "sandbox," the opposition gets a direct tool to undermine your credibility. Cross-examination is not a friendly chat. It is a structured attack.
Consider the practical scenario. An expert witness—say, a forensic accountant or a valuation expert—is called to testify about the financial health of a firm. The expert is employed by the firm. The expert's report is signed by the expert. But the expert is also a director of the same firm. Under the logic of B.S. Balaji v. T. Govindaraju, a co-director who disagrees with the expert's conclusions can cross-examine the expert. The corporate relationship does not shield the expert from adversarial questioning.
This is a critical lesson for expert witnesses: your professional relationship with the person asking the questions does not matter. What matters is whether your interests are adverse. If they are, you are a witness. And witnesses are cross-examined.
Why the limits of cross-examination matter
The court also turned to the case R v. Wakely to address a deeper question: how far can cross-examination go? The issue in that case was whether the limits of cross-examination could be precisely defined in relation to the facts in issue (the specific facts that must be proved to win a case).
The Court held that the limits of cross-examination are not susceptible to precise definition. A connection between a fact elicited by cross-examination and a fact in issue may appear, if at all, only after other pieces of evidence come forward. There is no test of general relevance that a trial judge can apply at the start of cross-examination to determine whether a question should be allowed.
This logic has a critical impact for expert testimony. If the scope of cross-examination is broad and non-definitive, an expert must be meticulously trained to identify and refuse to answer questions that stray beyond their professional expertise. The court itself may initially permit the line of questioning—but the expert must know where their sandbox ends.
Imagine the scene. The cross-examiner asks: "In your expert opinion, was the loan transaction commercially reasonable?" The expert begins to answer. But the question is not about valuation or accounting. It is about commercial reasonableness—a question that may involve legal, strategic, and managerial considerations beyond the expert's field. The expert must stop. The expert must say: "That question falls outside my field of expertise." If the expert answers, the cross-examiner has a weapon. The cross-examiner can later argue: "This expert gave an opinion on a matter outside their expertise. Their entire testimony is unreliable."
The court in R v. Wakely recognised that a trial judge cannot always know, at the moment a question is asked, whether it will lead to a relevant fact. The connection may only become clear later, after other evidence is presented. This means the expert cannot rely on the judge to protect them. The expert must protect themselves.
What this means for experts and lawyers
For a lawyer, this case confirms that cross-examination is a right that attaches to any adverse party, regardless of organisational ties. A co-director, a co-trustee, a co-signatory—none of these labels shield a witness from cross-examination by someone whose interests are opposed.
For an expert witness, the lesson is sharper. Cross-examination has no fixed boundary. A judge cannot always tell, at the moment a question is asked, whether it will lead to a relevant fact. That uncertainty means an expert must be ready to say: "That question falls outside my field of expertise." If the expert answers anyway, they hand the cross-examiner a weapon to attack their credibility.
The practical implications are significant. Every expert witness who testifies in a case involving multiple directors, multiple trustees, or multiple signatories must be aware that any one of those individuals may be an adverse party. The expert must prepare for cross-examination by someone who shares their organisational affiliation but opposes their conclusions. The expert must know the boundaries of their expertise with surgical precision. And the expert must have the discipline to stop when a question crosses those boundaries.
Training programmes for expert witnesses must incorporate this lesson. Mock cross-examinations should include scenarios where the cross-examiner is a co-director or co-trustee. The expert must learn to recognise the adversarial relationship even when it is masked by a shared corporate identity.
THE PLAY: Train every expert witness to recognise and refuse questions that cross the boundary of their professional competence—because the court may not protect them from their own answers.
The courtroom ended where it began
Two men, one firm, one loan, one question. The court answered: yes, you can cross-examine your co-director when your interests are adverse. Cross-examination is not a formality. It is a fight. And the expert who forgets that will lose before they finish their first answer.
The ruling in B.S. Balaji v. T. Govindaraju is a reminder that the adversarial system does not recognise corporate courtesy. It recognises adverse parties. And any party whose interests are opposed to a witness's testimony has the right to test that testimony through cross-examination. The boardroom, the partnership, the trust—these structures do not create immunity. They create witnesses. And witnesses are cross-examined.
For the legal profession, the case is a procedural landmark. For the expert witness, it is a warning. Prepare. Know your boundaries. And when the cross-examiner asks a question that strays beyond your expertise, stop. The court may not stop for you.