Professional Responsibility Legal Terms Glossary
Explore definitions, related concepts, and supporting case briefs.
Definitions
Duty of Competence
Under Model Rule 1.1, a lawyer must provide competent representation to a client, which requires the legal knowledge, skill, thoroughness, and preparation reasonably necessary for the representation. Competence is measured objectively and encompasses not only subject-matter expertise but also adequate investigation, research, and analysis. A lawyer who lacks competence in a particular area may still take the case if they can acquire the necessary knowledge through reasonable study or by associating with a competent co-counsel. Failure to meet this standard is one of the most common bases for attorney discipline and legal malpractice claims.
Duty of Diligence
Model Rule 1.3 requires that a lawyer act with reasonable diligence and promptness in representing a client. This duty goes beyond mere competence; it demands that the lawyer actively pursue the client's objectives, meet deadlines, carry out commitments, and avoid procrastination or neglect. Diligence does not require the lawyer to press for every possible advantage, but it does prohibit allowing a matter to languish through inattention. Chronic neglect of client matters is one of the leading causes of disciplinary complaints nationwide.
Duty of Confidentiality
Under Model Rule 1.6, a lawyer shall not reveal information relating to the representation of a client unless the client gives informed consent, the disclosure is impliedly authorized to carry out the representation, or a specific exception applies. This duty is broader than the attorney-client privilege because it covers all information relating to the representation regardless of its source, not just confidential communications. Narrow exceptions permit disclosure to prevent reasonably certain death or substantial bodily harm, to prevent client fraud that would cause substantial financial injury, or to comply with court orders. The duty survives the termination of the attorney-client relationship.
Attorney-Client Privilege (Ethics)
The attorney-client privilege is an evidentiary rule that protects confidential communications made between a client and attorney for the purpose of obtaining or providing legal advice. Unlike the broader ethical duty of confidentiality under Rule 1.6, the privilege is narrower in scope: it applies only to communications (not underlying facts), must involve a communication made in confidence, and must be for the purpose of seeking legal assistance. The privilege belongs to the client, not the attorney, meaning only the client can waive it. The crime-fraud exception defeats the privilege when the client seeks the lawyer's assistance in committing or planning a crime or fraud.
Conflict of Interest
Under Model Rules 1.7 through 1.10, a conflict of interest arises when a lawyer's ability to represent a client is materially limited by the lawyer's responsibilities to another client, a former client, a third person, or the lawyer's own personal interests. Rule 1.7 addresses current-client conflicts and establishes a two-part test: first, whether a concurrent conflict exists, and second, whether it is consentable (meaning a reasonable lawyer would believe competent representation is still possible). Even consentable conflicts require informed consent confirmed in writing from each affected client. Conflicts analysis is foundational to professional responsibility and permeates nearly every area of legal practice.
Informed Consent (Ethics)
Under the Model Rules, informed consent means the agreement by a person to a proposed course of conduct after the lawyer has communicated adequate information and explanation about the material risks of and reasonably available alternatives to the proposed course of conduct. It is required in numerous contexts, including waiver of conflicts of interest (Rule 1.7), disclosure of confidential information (Rule 1.6), and certain business transactions with clients (Rule 1.8). The consent must be based on facts and implications that a reasonable client would consider significant, and in many situations must be confirmed in writing. The adequacy of the disclosure is measured from the client's perspective, not the lawyer's.
Duty to Communicate
Model Rule 1.4 requires a lawyer to promptly inform the client of any decision or circumstance that requires the client's informed consent, to reasonably consult with the client about the means of achieving objectives, to keep the client reasonably informed about the status of the matter, and to promptly comply with reasonable requests for information. The duty also requires the lawyer to explain matters to the extent reasonably necessary to permit the client to make informed decisions. This rule ensures that the client retains ultimate authority over the objectives of the representation while the lawyer manages the tactical means, and its violation is consistently among the top reasons clients file bar complaints.
Candor Toward the Tribunal
Under Model Rule 3.3, a lawyer shall not knowingly make a false statement of fact or law to a tribunal, fail to correct a false statement of material fact or law previously made, or fail to disclose directly adverse legal authority in the controlling jurisdiction that opposing counsel has not disclosed. The duty of candor takes precedence over the duty of confidentiality when the two conflict, meaning a lawyer must disclose even client fraud on the tribunal. If a lawyer learns that a client or witness has offered false testimony, the lawyer must take reasonable remedial measures, which may include disclosure to the court if the client refuses to correct the record. This obligation continues until the proceedings conclude.
Frivolous Claims
Model Rule 3.1 prohibits a lawyer from bringing or defending a proceeding, or asserting or controverting an issue, unless there is a basis in law and fact for doing so that is not frivolous. A claim is frivolous if the lawyer is unable to make a good-faith argument on the merits of the action or for a modification, extension, or reversal of existing law. This standard parallels Federal Rule of Civil Procedure 11, which authorizes sanctions for filings made for improper purposes or without adequate legal and factual support. An exception exists in criminal defense, where every defendant is entitled to plead not guilty and require the prosecution to meet its burden regardless of the lawyer's personal assessment of guilt.
Pro Bono
Model Rule 6.1 provides that every lawyer has a professional responsibility to provide legal services to those unable to pay, aspirationally setting a benchmark of at least 50 hours per year of pro bono publico service. The rule prioritizes services to persons of limited means in civil matters involving basic needs such as housing, family law, and government benefits, as well as organizations serving the disadvantaged. While Rule 6.1 is aspirational rather than mandatory in most jurisdictions, some states require reporting of pro bono hours, and a few have adopted mandatory pro bono requirements. The pro bono obligation reflects the profession's monopoly on legal services and the resulting duty to ensure access to justice.
Malpractice (Legal)
Legal malpractice is a civil cause of action in which a client sues an attorney for professional negligence, requiring proof of four elements: (1) the existence of an attorney-client relationship establishing a duty of care, (2) breach of that duty by failing to exercise the skill and knowledge ordinarily possessed by attorneys in good standing, (3) actual and proximate causation (often called the "case within a case" requirement, meaning the client must show they would have prevailed in the underlying matter but for the attorney's negligence), and (4) damages. Malpractice is distinct from disciplinary violations; a lawyer can be disciplined without being liable for malpractice, and vice versa. Most jurisdictions apply a statute of limitations that begins to run when the client knew or should have known of the attorney's error.
Solicitation (Ethics)
Under Model Rule 7.3, solicitation occurs when a lawyer initiates direct, real-time contact with a prospective client for the purpose of obtaining professional employment when a significant motive is the lawyer's pecuniary gain. In-person and live telephone solicitation are generally prohibited because of the potential for overreaching, undue influence, and intimidation, particularly when the target is vulnerable. The Supreme Court in Ohralik v. Ohio State Bar Association (1978) upheld restrictions on in-person solicitation as consistent with the First Amendment, distinguishing it from advertising. Exceptions exist for contact with other lawyers, family members, close personal friends, and persons with whom the lawyer has a prior professional relationship.
Advertising (Legal)
Model Rule 7.2 permits lawyers to advertise their services through written, recorded, or electronic communications, including public media, subject to the requirements that the communication not be false or misleading under Rule 7.1. The Supreme Court first recognized a constitutional right to attorney advertising in Bates v. State Bar of Arizona (1977), holding that truthful advertising about the availability and cost of legal services is commercial speech protected by the First Amendment. Unlike solicitation, advertising is directed at the general public rather than targeted at specific individuals, which reduces the risk of coercion. Lawyers must retain copies of advertisements and include the name and contact information of at least one responsible lawyer.
Fee Agreements
Model Rule 1.5 governs the terms of lawyer-client fee arrangements and requires that a lawyer's fee be reasonable, assessed by factors including the time and labor involved, the novelty and difficulty of the questions, the skill required, the fee customarily charged in the locality, and the experience and reputation of the lawyer. The scope of the representation and the basis or rate of the fee must be communicated to the client, preferably in writing, before or within a reasonable time after commencing the representation. Contingent fees must always be in a writing signed by the client. Fee-splitting between lawyers in different firms requires client consent, and division of fees with non-lawyers is generally prohibited under Rule 5.4.
Contingency Fee
A contingency fee is an arrangement under Model Rule 1.5(c) in which the lawyer's fee is contingent upon obtaining a favorable result, typically calculated as a percentage of the recovery (commonly one-third of the settlement or judgment). Such agreements must be in a writing signed by the client that states the method by which the fee is determined, including the percentage that accrues at each stage of litigation and whether expenses are deducted before or after the fee is calculated. Contingency fees are categorically prohibited in domestic relations cases where the fee is contingent upon securing a divorce or the amount of alimony or property settlement, and in criminal cases. These arrangements serve the important policy of enabling clients who cannot afford hourly fees to access the legal system.
Trust Account (IOLTA)
Under Model Rule 1.15, lawyers must hold client and third-party funds separate from their own property in a trust account, commonly known as an Interest on Lawyers' Trust Account (IOLTA). The lawyer must promptly notify clients when funds are received on their behalf, promptly deliver funds the client is entitled to receive, and maintain complete records of all trust account transactions. Commingling of client funds with the lawyer's own funds is strictly prohibited and is one of the most heavily disciplined violations in legal ethics. IOLTA programs pool the nominal or short-term interest earned on these accounts and direct it to fund legal aid and other public interest programs, a system the Supreme Court upheld in Brown v. Legal Foundation of Washington (2003).
Duty to Supervise
Model Rules 5.1 and 5.3 impose supervisory obligations on lawyers who manage or direct other lawyers and nonlawyer assistants within a firm. A partner or supervisory lawyer must make reasonable efforts to ensure that the firm has measures in place giving reasonable assurance that all lawyers and staff conform to the Rules of Professional Conduct. A supervising lawyer is responsible for another lawyer's or nonlawyer's ethical violation if the supervisor ordered or ratified the conduct, or if the supervisor knew of the conduct at a time when its consequences could have been avoided or mitigated but failed to take reasonable remedial action. These rules ensure that senior lawyers cannot insulate themselves from ethical responsibility by delegating tasks to subordinates.
Imputed Disqualification
Under Model Rule 1.10, when one lawyer in a firm has a conflict of interest under Rules 1.7 or 1.9, that conflict is generally imputed to every other lawyer in the firm, disqualifying the entire firm from the representation. The rationale is that lawyers within a firm are presumed to share confidential information, making it impossible for a single lawyer to be screened from a matter in most circumstances. Under the 2009 amendments to the Model Rules, screening with timely notice to the affected client is permitted when the conflict arises from a lawyer's prior firm association (a lateral hire), but many jurisdictions have not adopted this screening provision. Imputation does not apply to conflicts based solely on a lawyer's personal interest that does not present a significant risk of materially limiting other lawyers' representation.
Successive Representation
Model Rule 1.9 governs conflicts arising from a lawyer's duties to former clients, prohibiting a lawyer who has formerly represented a client in a matter from representing another person in the same or a substantially related matter where that person's interests are materially adverse to the former client, unless the former client gives informed consent confirmed in writing. The critical inquiry is whether the matters are 'substantially related,' which courts typically assess by examining whether the factual or legal issues overlap significantly or whether confidential information from the prior representation could be used to the former client's disadvantage. This rule protects the former client's reasonable expectation that information shared during the prior representation will not be used against them. The duty persists even after the attorney-client relationship ends and extends through imputation to the lawyer's firm.
Withdrawal from Representation
Model Rule 1.16 governs when a lawyer must or may withdraw from representing a client. Mandatory withdrawal is required when the representation will result in a violation of the Rules of Professional Conduct or other law, when the lawyer's physical or mental condition materially impairs the ability to represent the client, or when the lawyer is discharged by the client. Permissive withdrawal is allowed when it can be accomplished without material adverse effect on the client's interests, including situations where the client persists in a course of action the lawyer reasonably believes is criminal or fraudulent, the client has used the lawyer's services to perpetrate a crime, or the client fails to fulfill an obligation regarding fees. Upon withdrawal, the lawyer must take steps to protect the client's interests, including giving reasonable notice, allowing time for new counsel, and surrendering papers and property to which the client is entitled.