Interrogatories administered to a company have, of course, the special feature that as the company is an artificial person they must be answered not by the litigant but by some human being who holds a position in relation to the company which enables him to give the answers, such as a director, or, here, a liquidator. Yet throughout, the question is not what is known to the individual but what is known to the company. A director or liquidator who answers that he does not know is not answering the question; for the question is what the company knows, not merely what the director or liquidator knows. The person answering the interrogatories is accordingly bound to make all reasonable inquiries which are likely to reveal, or may reveal, what is known to the company. In order to show that this has been done, it is obviously desirable that the answers should include some statement which shows that the person swearing the answers has applied his mind to this duty and has attempted to discharge it. This, however, is all that I think is required. I do not think that there is any duty to set out the details of the inquiries made, giving the names and addresses of all persons questioned, and specifying what questions were asked, and so on. If the answers do not at least state in general terms that the person swearing to them has made diligent inquiries of all officers, servants and agents of the company who might reasonably be expected to have some knowledge relevant to the questions, the party administering the interrogatories may justifiably question whether the company has discharged its obligations in answering the questions. In particular, if any person is an obvious source of knowledge, he must be questioned. If he is not, the company should say why. (p251)
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I would add this. I am not laying down that answers to interrogatories by a company must always include information and explanations as to the inquiries made, though in many cases it will be convenient to include them, at least in outline. What I am saying is that a company which is interrogated and gives answers which give no indication whether there has been any attempt to tap obvious sources of information must be prepared, on inquiry made, to give explanations of reasonable amplitude and, if required, verify them by affidavit. What it should not do is to withhold this information until the matter is brought before the court and then supply the information in unverified form in the course of counsel's submissions. A company which does this has only itself to blame if the court takes an unfavourable view of this mode of proceeding, both generally and in relation to costs. All concerned must seek to avoid the evils of unnecessary litigation and unnecessary costs; and those advising a company should never forget that the answers to interrogatories administered to the company are the answers of that company itself, using all the internal sources of the company to discover what the company collectively knows, and not merely the answers of the person, whether officer, liquidator or anyone else, who swears to the answers. (p253)