The duty in context
Proper basis for allegations court
The lawyer must not allege fact, fraud, criminality or serious misconduct, or put credit suggestions, without reasonable grounds providing a proper basis and (for serious allegations) the client's instructions.
How the codes express this duty
E&W Solicitors SRA Principles & Code CCS 2.4 partial 340 cases
2.4 You only make assertions or put forward statements, representations or submissions to the court or others which are properly arguable.
SRA Code of Conduct for Solicitors, RELs and RFLs · 2019 · archived copy · official source ↗
E&W Barristers BSB Handbook rC7.3; rC9.2.c strong 21 cases
rC7.3 you must not make a serious allegation against any person, or suggest that a person is guilty of a crime with which your client is charged unless: .a you have reasonable grounds for the allegation; and .b the allegation is relevant to your client's case or the credibility of a witness; and .c where the allegation relates to a third party, you avoid naming them in open court unless this is reasonably necessary. rC9.2.c any allegation of fraud, unless you have clear instructions to allege fraud and you have reasonably credible material which establishes an arguable case of fraud;
BSB Handbook · current · archived copy · official source ↗
Cayman Islands Legal Services Code 2026 R.2.5(c); R.3.2(b)(iii) strong
make a serious allegation against any person, or suggest that a person is guilty of a crime with which the attorney-at-law's client is charged unless — (i) there are reasonable grounds for the allegation; (ii) the allegation is relevant to the client's case or the credibility of a witness... any allegation of fraud, unless the attorney-at-law has clear instructions to allege fraud and has reasonably credible material which establishes an arguable case of fraud
Cayman Islands Legal Services Code of Professional Conduct · 2026 · archived copy
AU Solicitors Solicitors' Conduct Rules Rules 21.3; 21.4; 21.5 strong 55 cases
21.3 A solicitor must not allege any matter of fact in: ... unless the solicitor believes on reasonable grounds that the factual material already available provides a proper basis to do so. 21.4 A solicitor must not allege any matter of fact amounting to criminality, fraud or other serious misconduct against any person unless the solicitor believes on reasonable grounds that: 21.4.1 available material by which the allegation could be supported provides a proper basis for it; and 21.4.2 the client wishes the allegation to be made...
Australian Solicitors' Conduct Rules · 2015 (June 2026 compilation) · archived copy · official source ↗
AU Barristers Uniform Barristers Rules rr63-64,66 strong 24 cases
A barrister must not allege any matter of fact ... unless the barrister believes on reasonable grounds that the factual material already available provides a proper basis to do so. A barrister must not allege any matter of fact amounting to criminality, fraud or other serious misconduct against any person unless the barrister believes on reasonable grounds that ... a proper basis for it; and ... the client wishes the allegation to be made.
Legal Profession Uniform Conduct (Barristers) Rules · 2015 (as amended 14 May 2025) · archived copy · official source ↗
IE Solicitors Law Society Guide Ch5 — Solicitor instructed in professional negligence proceedings partial 19 cases
A solicitor should not make allegations of professional negligence or issue proceedings alleging professional negligence in the absence of supportive independent expert evidence.
Solicitor's Guide to Professional Conduct (Law Society of Ireland) · 4th ed. (2022) · archived copy · official source ↗
IE Barristers Bar Code of Conduct Rule 5.8; Rule 5.5 strong 19 cases
A Barrister shall not settle a pleading claiming fraud without express instructions and without having satisfied himself that there is or will be available at the trial of the action evidence to support such a claim.
Code of Conduct for the Bar of Ireland · 2024 · archived copy · official source ↗
JM Attorneys Canons of Professional Ethics no clear equivalent
JE Lawyers Law Society of Jersey Code R.3.5 c); R.4.2 b)iii) strong
Members must not: ... c) make a serious allegation against any person, or suggest that a person is guilty of a crime with which their client is charged unless: i) they have reasonable grounds for the allegation; and ii) the allegation is relevant to their client's case or the credibility of a witness... [R.4.2 b)iii)] not draft any... document containing... iii) Any allegation of fraud, unless the member has clear instructions to allege fraud and has reasonably credible material which establishes an arguable case of fraud.
Law Society of Jersey Code of Conduct · 1 January 2017 · archived copy · official source ↗
ON Lawyers LSO Rules of Prof. Conduct r 5.1-2(g) strong
When acting as an advocate, a lawyer shall not ... knowingly assert as true a fact when its truth cannot reasonably be supported by the evidence or as a matter of which notice may be taken by the tribunal
Law Society of Ontario — Rules of Professional Conduct · current · archived copy · official source ↗
BC Lawyers BC Code r 5.1-2(g) strong 5 cases
When acting as an advocate, a lawyer must not: ... (g) knowingly assert as fact that which cannot reasonably be supported by the evidence or taken on judicial notice by the tribunal;
Code of Professional Conduct for British Columbia (BC Code) · 2017 · archived copy · official source ↗
NZ Lawyers Conduct & Client Care Rules r 13.8.1 strong
A lawyer must not be a party to the filing of any document in court alleging fraud, dishonesty, undue influence, duress, or other reprehensible conduct, unless the lawyer has taken appropriate steps to ensure that reasonable grounds for making the allegation exist.
Lawyers and Conveyancers Act (Lawyers: Conduct and Client Care) Rules 2008 · SR 2008/214 · archived copy · official source ↗
SCO Solicitors LSS Standards of Conduct no clear equivalent
SG Lawyers Professional Conduct Rules 2015 r 9 (Conduct of proceedings) partial 11 cases
9 Conduct of proceedings
Legal Profession (Professional Conduct) Rules 2015 · 2015 · archived copy · official source ↗
HK Solicitors Solicitors' Guide Principle 10.03 Commentary 1 / Principle 10.07 Commentary 4 & 6 strong
Breaches of this Principle include: ... (b) knowingly asserting something as a fact for which there is no reasonable basis in evidence, or the admissibility of which must first be established ... This Principle also prohibits a solicitor from making or instructing a barrister to make an allegation which is scandalous. ... A solicitor should not, in a plea in mitigation, make or instruct a barrister to make an allegation which is likely to vilify or insult any person, without having first satisfied himself that there are reasonable grounds for making the statement.
Hong Kong Solicitors' Guide to Professional Conduct (Volume 1) · current · archived copy · official source ↗
HK Barristers Bar Code of Conduct para 10.23(a)-(b) strong
A practising barrister instructed to draft or settle a court document ... He may not:- (a) make any allegation unsupported by his instructions; (b) allege fraud unless he has clear instructions to make such allegation and he has before him reasonably credible material which, as it stands, establishes a prima facie case of fraud;
Code of Conduct of the Bar of the Hong Kong SAR · 2018 · archived copy · official source ↗
Cases dealing with this duty
475 decisions · link basis: found breached = a tribunal finding; rule cited = the mapped provision is cited in the decision; text match = high-precision text pattern
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Ebru Atas
Breaches
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Roger Brian Allanson
Breaches, Failures, Solicitors' Accounts Rules
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Matthew Kenneth Manz
The respondents conduct is charaterised as professional misconduct.
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Margaret Faith Rimmer
Guilty of professional misconduct
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Melvi Poh Onn Tay
Guilty of professional misconduct
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Timothy Vincent Charles Meehan
Guilty of professional misconduct with respect to Charges 1 and 2
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Moya O'Donnell
In the matter of Moya O’Donnell, solicitor, practising as Moya O’Donnell & Co, Solicitors, Elm Wood Terrace, Main Street, Killybegs, Co Donegal, and Glen Road, Glenties, Co Donegal, and in the matter of the Solicitors A…
strike_off View decision -
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Keith John O'Neill
Breaches, Client Money, Failures, Solicitors' Accounts Rules
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Michelle Louise Craven
Breaches
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Biplab Kumar Poddar
Breaches, Solicitors' Accounts Rules
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Michael Collier
Breaches, Client Money, Solicitors' Accounts Rules
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Keisha Hackett
Breaches, Solicitors' Accounts Rules
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Shuaib Saeed
Breaches, Failures, Solicitors' Accounts Rules
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Robert John Metcalfe
Breaches, Failures, Solicitors' Accounts Rules
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Gary Burns
Breaches
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ARTHUR METAXAS
Professional Misconduct and public reprimand
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Imelda Leahy
In the matter of Imelda Leahy, a solicitor formerly practising as Imelda Leahy and Company, Solicitors, Kilree Street, Bagenalstown, Co Carlow, and in the matter of an application by the Law Society of Ireland to the So…
strike_off View decision -
Osman, Zenah
1. Attempt to mislead the Federal Court 2. Affirming a false affidavit 3. Serving a false affidavit 4. Make false and misleading representations to other legal practitioners 5. Purported to act for organisations or pers…
Costs Removal of lawyer's name from the Roll of Local Lawyers $0.00 Proceedings Instituted 1 PDF View decision -
Grant Reuben FORWARD
Guilty of one count of professional misconduct for being convicted of a serious criminal offence.
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Gary O’Flynn
In the matter of Gary O’Flynn, a solicitor formerly practising as Gary O’Flynn, Solicitors, Unit 9 Nof Commercial Centre, Old Mallow Road, Cork, and in the matter of the Solicitors Acts 1954-2015 [10549/DT20/16 and High…
strike_off View decision -
Patrick Callanan
In the matter of Patrick Callanan, and in the matter of an application by the Law Society of Ireland to the Solicitors Disciplinary Tribunal, and in the matter of the Solicitors Acts 1954-2015 [7251/DT88/10]; High Court…
strike_off View decision -
Michael James QUINN
Guilty of professional misconduct on all charges.
Duty classification does not yet cover every jurisdiction (Ontario, New Zealand and Singapore decisions are indexed but not yet duty-classified), so counts here understate those corpora.