Rule Text (verbatim from The Florida Bar)
(a) When Lawyer May Testify. A lawyer shall not act as
advocate at a trial in which the lawyer is likely to be a necessary
witness on behalf of the client unless:
(1) the testimony relates to an uncontested issue;
(2) the testimony will relate solely to a matter of formality
and there is no reason to believe that substantial evidence will be
offered in opposition to the testimony;
(3) the testimony relates to the nature and value of legal
services rendered in the case; or
(4) disqualification of the lawyer would work substantial
hardship on the client.
(b) Other Members of Law Firm as Witnesses. A lawyer
may act as advocate in a trial in which another lawyer in the
lawyer’s firm is likely to be called as a witness unless precluded
from doing so by rule 4-1.7 or 4-1.9.
Educational reference. This page summarizes a Florida Rule of Professional Conduct for educational purposes. The rule text and Comment are mirrored from the Florida Bar's official publication and are public domain. The plain-English summary and any commentary are the opinion of Phillips, Hunt & Walker and are general information only — not legal advice. Reading this page does not create an attorney-client relationship. If you believe a Florida lawyer has violated this rule, you can file a complaint with The Florida Bar at floridabar.org. Past results do not guarantee a similar outcome.
What this rule means in plain English
A Florida lawyer cannot serve as advocate at a trial where the lawyer is likely to be a necessary witness, except in narrow circumstances (uncontested matters, the lawyer’s own fee dispute, when disqualification would cause substantial hardship to the client). The rule recognizes the structural conflict between being an advocate and being a witness in the same proceeding. If your lawyer is also a witness in your case, expect a disqualification motion.
Florida Bar Ethics Opinions interpreting this rule
- Opinion 64-57 (1964)
<p>A lawyer working full-time as an assistant city attorney cannot also serve as president of an association of city employees AND lobby city officials for that association — those are mutually conflicting roles. (The Bar later overruled the part disapproving union membership itself; the conflict-of-interest analysis stands.) The takeaway: dual representation across the city-versus-employees line is a non-starter.</p>
Read on floridabar.org → - Opinion 69-40 (1969)
<p>A lawyer cannot interview the opposing party about anticipated witness testimony without consent from that party's lawyer. The witness label doesn't open a back door around the represented-party rule. Once someone is represented in a matter, all substantive contact about that matter must go through their lawyer — including pre-trial witness prep questions.</p>
Read on floridabar.org → - Opinion 84-4 (1984)
<p>A shareholder of an incorporated law firm can represent the firm at trial in a fee dispute against a former client, even though other shareholders will be called as witnesses. The lawyer-as-witness rule has narrower exceptions than people often think — fee disputes within a firm are one of them. Outside that exception, dual lawyer-and-witness roles usually require disqualification.</p>
Read on floridabar.org →
Comment (verbatim from The Florida Bar)
Combining the roles of advocate and witness can prejudice the
tribunal and the opposing party and can also involve a conflict of
interest between the lawyer and client.
The trier of fact may be confused or misled by a lawyer serving
as both advocate and witness. The combination of roles may
prejudice another party’s rights in the litigation. A witness is
required to testify on the basis of personal knowledge, while an
advocate is expected to explain and comment on evidence given by
others. It may not be clear whether a statement by an advocate-
witness should be taken as proof or as an analysis of the proof.
To protect the tribunal, subdivision (a) prohibits a lawyer from
simultaneously serving as advocate and necessary witness except in
those circumstances specified. Subdivision (a)(1) recognizes that if
the testimony will be uncontested, the ambiguities in the dual role
are purely theoretical. Subdivisions (a)(2) and (3) recognize that,
where the testimony concerns the extent and value of legal services
rendered in the action in which the testimony is offered, permitting
the lawyers to testify avoids the need for a second trial with new
counsel to resolve that issue. Moreover, in such a situation the
judge has first-hand knowledge of the matter in issue; hence, there
is less dependence on the adversary process to test the credibility of
the testimony.
Apart from these 2 exceptions, subdivision (a)(4) recognizes
that a balancing is required between the interests of the client and
those of the tribunal and the opposing party. Whether the tribunal
is likely to be misled or the opposing party is likely to suffer
prejudice depends on the nature of the case, the importance and
probable tenor of the lawyer’s testimony, and the probability that
the lawyer’s testimony will conflict with that of other witnesses.
Even if there is risk of such prejudice, in determining whether the
lawyer should be disqualified, due regard must be given to the effect
of disqualification on the lawyer’s client. It is relevant that one or
both parties could reasonably foresee that the lawyer would
probably be a witness. The conflict of interest principles stated in
rules 4-1.7, 4-1.9, and 4-1.10 have no application to this aspect of
the problem.
Because the tribunal is not likely to be misled when a lawyer
acts as advocate in a trial in which another lawyer in the lawyer’s
firm will testify as a necessary witness, subdivision (b) permits the
lawyer to do so except in situations involving a conflict of interest.
In determining if it is permissible to act as advocate in a trial
in which the lawyer will be a necessary witness, the lawyer must
also consider that the dual role may give rise to a conflict of interest
that will require compliance with rules 4-1.7 or 4-1.9. For example,
if there is likely to be substantial conflict between the testimony of
the client and that of the lawyer, the representation involves a
conflict of interest that requires compliance with rule 4-1.7. This
would be true even though the lawyer might not be prohibited by
subdivision (a) from simultaneously serving as advocate and
witness because the lawyer’s disqualification would work a
substantial hardship on the client. Similarly, a lawyer who might
be permitted to simultaneously serve as an advocate and a witness
by subdivision (a)(3) might be precluded from doing so by rule 4-
1.9. The problem can arise whether the lawyer is called as a
witness on behalf of the client or is called by the opposing party.
Determining whether such a conflict exists is primarily the
responsibility of the lawyer involved. If there is a conflict of interest,
the lawyer must secure the client’s informed consent. In some
cases, the lawyer will be precluded from seeking the client’s
consent. See rule 4-1.7. If a lawyer who is a member of a firm may
not act as both advocate and witness by reason of conflict of
interest, rule 4-1.10 disqualifies the firm also. See terminology for
the definition of “confirmed in writing” and “informed consent.”
Subdivision (b) provides that a lawyer is not disqualified from
serving as an advocate because a lawyer with whom the lawyer is
associated in a firm is precluded from doing so by subdivision (a).
If, however, the testifying lawyer would also be disqualified by rule
4-1.7 or 4-1.9 from representing the client in the matter, other
lawyers in the firm will be precluded from representing the client by
rule 4-1.10 unless the client gives informed consent under the
conditions stated in rule 4-1.7.
Amended July 23, 1992, effective January 1, 1993 (605 So.2d 252);
amended March 23, 2006, effective May 22, 2006 (933 So.2d 417).