2-9 Lawyer as Witness
A lawyer may not advocate for a client in a matter where the lawyer will be called as a witness unless the lawyer's testimony would involve an uncontested matter, the lawyer's fee152 or unless disqualification of the lawyer would work substantial hardship on the client.153 The origins of this rule are in the traditional prohibition on a person testifying in his own case. The idea was that if the client could not testify, the client's lawyer should also be barred. The modern rationale for the rule is that it would be improper for the same person to be both witness and advocate.
This rule does not prohibit another lawyer in the same firm from representing the client unless precluded from doing so by the conflicts rules.154 Note also that the rule does not prohibit the lawyer from being involved in the matter up to the point of trial.155 If, however, after pretrial matters are concluded and the opposing party still elects to call the lawyer as a witness, he may be disqualified.156
In one matter, a court rejected an argument that Rule 3.7 could not be used as a basis for disqualification prior to the start of trial.157 In another case, a court refused to disqualify an attorney on Rule 3.7 grounds when it was not shown that he was a necessary witness and the conversations between himself and his former client were privileged and not admissible.158 Disqualification was also avoided when it was shown that the information was available from other witnesses.159 A lawyer was disqualified when his testimony was deemed...
