Attorney-client privilege protects confidential communications between a lawyer and a client when they are made for the purpose of seeking or providing legal advice. The privilege generally allows the client to prevent those communications from being disclosed in court or during litigation.
Attorney-client privilege is a legal protection that allows people to communicate privately with their lawyers. Its purpose is to encourage clients to speak openly about facts, problems, and concerns without fearing that those conversations will later be disclosed to an opposing party, prosecutor, government agency, or court.
The U.S. Supreme Court has described attorney-client privilege as one of the oldest recognized protections for confidential communications. The Court has explained that the privilege encourages full and frank communication between lawyers and clients, which helps attorneys provide informed legal advice and supports the administration of justice.
Attorney-client privilege exists in both civil and criminal law, but the precise rules can differ depending on the court and jurisdiction. In federal court, Federal Rule of Evidence 501 generally leaves privilege questions to federal common law unless the Constitution, a federal statute, or Supreme Court rules provide otherwise. When state law supplies the rule of decision in a civil case, state privilege law generally controls.
Although courts phrase the requirements somewhat differently, attorney-client privilege generally protects a communication when it is between a lawyer and client, is intended to remain confidential, and is made for the purpose of obtaining or providing legal advice.
A federal court summarized those requirements in United States v. Heppner as communications between a client and attorney that were intended to be and actually were kept confidential and were made for the purpose of obtaining or providing legal advice.
Privilege can cover more than a formal meeting in a lawyer's office. Emails, telephone calls, letters, text messages, video conferences, and other communications can qualify when the required elements are present.
A signed retainer agreement is also not necessarily what creates the protection. Depending on the governing law, communications made while someone is seeking legal advice from a lawyer may receive protection even before a formal attorney-client relationship begins.
The privilege generally protects communications, rather than the underlying facts.
A client cannot make an independently discoverable fact secret simply by telling it to a lawyer. If a client witnessed an accident, signed a contract, attended a meeting, or received a particular document, those underlying facts do not ordinarily become privileged merely because the client later discusses them with counsel.
What can be protected is the confidential exchange between lawyer and client about those facts, including questions asked by the client, information provided for the purpose of receiving legal advice, and the attorney's legal advice in response.
The distinction is important in litigation. An opposing party may be entitled to discover relevant facts while remaining unable to compel disclosure of protected attorney-client communications concerning those same facts.
Attorney-client privilege generally belongs to the client.
The client can assert the privilege and, in appropriate circumstances, waive it. Lawyers normally have an obligation to protect privileged communications on behalf of their clients rather than disclose them without authorization.
The Supreme Court has also held that attorney-client privilege generally survives the client's death. In Swidler & Berlin v. United States, the Court rejected a proposed criminal-investigation exception that would have allowed disclosure of privileged communications after a client's death.
Confidentiality is central to attorney-client privilege. Voluntarily revealing a protected communication to an unrelated third party can waive the privilege because the communication is no longer being kept confidential.
Waiver questions can become complicated when communications are accidentally disclosed during litigation. Federal Rule of Evidence 502 provides that an inadvertent disclosure in a federal proceeding does not necessarily waive privilege if the holder took reasonable steps to prevent disclosure and acted promptly to correct the mistake.
Not every third person's involvement destroys privilege. Communications involving interpreters, paralegals, investigators, accountants, consultants, or other people assisting a lawyer can sometimes remain protected when their involvement is necessary or sufficiently connected to the provision of legal advice. Similar issues can arise when separately represented parties share confidential communications under a recognized common legal interest. The applicable rules vary by jurisdiction and circumstances.
Attorney-client privilege does not protect communications made for the purpose of obtaining a lawyer's assistance in committing or furthering a crime or fraud.
The exception does not mean that someone loses the ability to speak confidentially with a lawyer because the person committed a crime in the past. A client can ordinarily seek legal advice about past conduct, including conduct that could lead to criminal charges.
The distinction concerns the purpose of the communication. In United States v. Zolin, the Supreme Court explained that the crime-fraud exception prevents the privilege from shielding communications seeking legal assistance in furtherance of future illegal conduct.
Courts can conduct an in camera review—meaning a private judicial review of disputed material—when the required evidentiary showing has been made to determine whether the crime-fraud exception applies.
Attorney-client privilege is frequently confused with the work product doctrineThe work product doctrine protects certain materials prepared by or for a lawyer, party, or representative in anticipation of litigation or for trial. It is designed to keep an opposing party from gaining access to an attorney’s legal strategy, mental impressions, and litigation preparation.Read more →. They are related protections, but they serve different purposes.
Attorney-client privilege focuses primarily on confidential communications made for legal advice. Work-product protection generally concerns materials prepared by or for lawyers in anticipation of litigation or for trial. Federal Rule of Evidence 502 expressly treats attorney-client privilege and work-product protection as separate concepts.
A document therefore does not automatically become privileged simply because a lawyer possesses it, and something that is not protected by attorney-client privilege could potentially qualify for work-product protection under the appropriate circumstances.
Generative artificial intelligence has created a new question: What happens when a client discusses confidential legal information with an AI platform?
A 2026 federal court decision provides an early answer, although the law remains developing.
In United States v. Heppner, a criminal defendant used Anthropic's Claude to develop reports concerning possible defense arguments and later shared the material with his lawyers. The U.S. District Court for the Southern District of New York held that the AI exchanges were not protected by attorney-client privilege. Among the court's reasons were that the communications were not between the defendant and his attorney, the defendant had communicated the information to a third-party AI platform, and his lawyer had not directed him to use Claude.
The court also indicated that the analysis could potentially be different when a lawyer directs a client to use an AI system functioning as an agent in connection with the representation.
Heppner does not establish a nationwide rule governing every use of generative AI. It does show why clients and lawyers cannot assume that information entered into a publicly available AI service will receive the same protection as a confidential conversation between attorney and client. Questions involving the platform's privacy practices, who directed its use, why it was used, and who could access the information can affect the privilege analysis.
People often need to reveal uncomfortable, damaging, or highly personal information before a lawyer can give useful advice. Attorney-client privilege creates a protected setting for those conversations.
The protection is deliberately limited. It does not make facts secret, cover every conversation involving an attorney, or permit lawyers to help clients carry out future crimes or frauds. Its central role is narrower: protecting confidential communications made for legitimate legal advice.
That protection allows clients to tell their lawyers what actually happened—and allows lawyers to advise them based on the complete story.
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