Model Rule 8.3: Reporting Professional Misconduct
Rule 8.3 requires a lawyer to tell the appropriate professional disciplinary authority when the lawyer knows another lawyer has committed a violation of the ethics rules that raises a substantial question about that lawyer's honesty, trustworthiness, or fitness to practice law. It also requires similar reporting of known judicial misconduct that raises a substantial question about a judge's fitness for office. The duty is triggered by actual knowledge, not mere suspicion or rumor.
When it applies
This rule comes up when a lawyer learns—through direct observation, client disclosure, or other reliable means—that a colleague or judge has engaged in serious misconduct, and the MPRE frequently tests whether the lawyer's level of certainty and the severity of the violation trigger a mandatory report. It's a favorite testing ground because students often confuse "knows" with "reasonably should know" or "suspects."
What the rule requires
- Report to the appropriate disciplinary authority when you have actual knowledge (not mere suspicion) of another lawyer's misconduct.
- The known violation must raise a substantial question about the other lawyer's honesty, trustworthiness, or fitness to practice—not every rule violation qualifies.
- A parallel duty applies to known judicial misconduct that raises a substantial question about the judge's fitness for office.
- Use of the word 'shall' makes reporting mandatory once the knowledge and substantiality thresholds are met, not merely permissive.
- The reporting obligation exists independently of whether the underlying misconduct also affects the reporting lawyer's own client.
Exceptions
- No duty to report information protected by attorney-client confidentiality under Rule 1.6, even if it reveals another lawyer's or judge's misconduct.
- No duty to report information gained while participating in an approved lawyers or judges assistance program, to encourage lawyers and judges to seek help without fear of exposure.
- Minor or technical violations that do not raise a substantial question about fitness, honesty, or trustworthiness need not be reported.
How the MPRE tests Model Rule 8.3
- Students often think 'reasonably should know' triggers the duty; the rule requires actual knowledge, a higher standard.
- Students forget that trivial or minor infractions don't count—only violations raising a substantial question about fitness, honesty, or trustworthiness are reportable.
- Confusing this rule's mandatory reporting duty with the permissive disclosure allowed under Rule 1.6 exceptions for client confidences.
- Missing that confidentiality under Rule 1.6 can override the 8.3 duty, so information relating to a client's representation—whatever its source, not just what the client says—does not have to be reported unless the client consents.
Example
Attorney Pat directly witnesses opposing counsel forge a client's signature on a settlement document and later confirms this with the notary who admits complicity. Because Pat has actual knowledge of a violation involving dishonesty (forgery), which clearly raises a substantial question about opposing counsel's trustworthiness, the conduct is reportable under Rule 8.3. However, because Pat learned this while representing a client, the information relates to that representation and is protected by Rule 1.6 regardless of its source. Pat should therefore seek the client's informed consent to report. If the client consents, Rule 8.3 requires Pat to report the conduct to the disciplinary authority.
Related rules
On the MPRE
A plain-English summary of the ABA Model Rule, not the rule text. Your jurisdiction's version of the rule controls in practice.