AH0880 - Commissioners’ Hearing: Examination of Witnesses: Guidelines for cross examination


  1. The first question you must ask yourself at the conclusion of the examination in chief of a witness is `Do I need to cross-examine?'. That is to say, has the witness said anything unfavourable, or omitted anything favourable which I want brought out, or are there aspects of the HMRC case which I need to put to the witness? In the vast majority of cases the answer will be yes.
  2. Before beginning any cross-examination, you must decide what you are hoping to achieve - ask yourself what your objective is with each witness you cross-examine. Obviously it is important to have some questions prepared, but your line of questioning will to some extent be determined by what emerges in examination in chief. You will therefore need to compose some questions on the spot but try to have a plan and keep to it. You should have a clear note of the aspects of the case on which the witness can speak from his personal knowledge - you should not ask questions on matters which are outside of this. You should also have a note of the aspects on which you anticipate you will have to challenge the witness (or perhaps seek further elucidation or elaboration).
  3. Keep your questions short, simple and direct - remember the `one-at-a-time rule' (see AH0851). Take events and questions in an historical, logical sequence. In cross-examination, you are not restricted to matters which emerged in the examination in chief and you should try not to repeat questions which have already been asked. The answers will only reinforce the evidence for the appellant.
  4. You are allowed to ask leading questions. Often it is only by using them that you can test a witness's means of knowledge, opportunities of observation, reasons for recollection or belief and any special circumstances affecting his ability to speak to the particular case. However you should take care not to make the witness a mere mouthpiece for yourself as this will make his evidence sound less convincing than if he answers spontaneously. A good opening for a question is often `Please tell the Commissioners.......'.
  5. It is very important to be able to recognise when you are getting nowhere with a particular line of questioning and to have the courage to abandon it. A good rule is `If you have not struck oil in five minutes, stop boring'. It is also important to know when and how to stop a particular line of questioning - not to ask one question too many.
  6. It is a principle of cross-examination (as well as examination in chief) that you should not ask a question to which you do not know the likely answer. This principle should be breached only with discretion. In essence what this means is that you must know the facts of the case intimately so that you do not lose sight of what you are trying to establish. If you do not stray from the point there is far less opportunity for the witness to do so.
  7. It should be borne in mind that although hearsay evidence may be admitted by the Commissioners, it may not necessarily be the best evidence available (see AH0710). When cross- examining a witness, therefore, it will be important for you to identify what part of his/her evidence, if any, is hearsay.
  8. Although you can attack the character of any witness, including the appellant, any challenge you make to a witness should be to the reliability of his/her evidence and not to the witness himself. The distinction is important. To suggest to a witness that s/he is (deliberately) lying is a high risk strategy. There are more diplomatic ways of suggesting that a witness's evidence is unreliable and should not carry much weight, and that other evidence (or even an inference to be drawn by the Commissioners) is to be preferred.
  9. If the appellant gives evidence, then you may ask questions in cross-examination, including leading questions, in exactly the same manner as any other witness.
  10. In a contentious appeal relating to an enquiry where the appellant denies irregularities, it may be relevant to ask the appellant, for example, whether he has previously made an enquiry settlement with the HMRC. Since it is the appellant's own credibility which is in issue in the appeal, the question is did s/he make a true return of his/her income or not, any denial of an earlier investigation settlement can be rebutted by actually proving the settlement circumstances. However, where you are attacking the character of a witness other than the appellant, you cannot normally bring affirmative evidence to show bad character. All you can do is to put any discreditable episodes from his history to the witness. If the witness denies them, his/her answer must be accepted as final.
  11. You must remember to keep separate in your mind the bringing out of evidence from commenting on its implications. Resist the temptation to comment on evidence during cross- examination; the opportunity to do so will arise during your submissions to the Commissioners when all the evidence is before them.