ER 1.6. Confidentiality of Information
(a) A lawyer shall not reveal information relating to the representation of a client unless the client gives informed consent, the disclosure is impliedly authorized in order to carry out the representation or the disclosure is permitted or required by paragraphs (b), (c) or (d), or ER 3.3(a)(3).
(b) A lawyer shall reveal such information to the extent the lawyer reasonably believes necessary to prevent the client from committing a criminal act that the lawyer believes is likely to result in death or substantial bodily harm.
(c) A lawyer may reveal the intention of the lawyer's client to commit a crime and the information necessary to prevent the crime.
(d) A lawyer may reveal such information relating to the representation of a client to the extent the lawyer reasonably believes necessary:
(1) to prevent the client from committing a crime or fraud that is reasonably certain to result in substantial injury to the financial interests or property of another and in furtherance of which the client has used or is using the lawyer's services;
(2) to mitigate or rectify substantial injury to the financial interests or property of another that is reasonably certain to result or has resulted from the client's commission of a crime or fraud in furtherance of which the client has used the lawyer's services;
(3) to secure legal advice about the lawyer's compliance with these Rules;
(4) to establish a claim or defense on behalf of the lawyer in a controversy between the lawyer and the client, to establish a defense to a criminal charge or civil claim against the lawyer based upon conduct in which the client was involved, or to respond to allegations in any proceeding concerning the lawyer's representation of the client; or
(5) to comply with other law or a final order of a court or tribunal of competent jurisdiction directing the lawyer to disclose such information.
(6) to prevent reasonably certain death or substantial bodily harm.
(7) to detect and resolve conflicts of interest arising from the lawyer's change of employment or from changes in the composition or ownership of a firm, but only if the revealed information would not compromise the attorney-client privilege or otherwise prejudice the client.
(e) A lawyer shall make reasonable efforts to prevent the inadvertent or unauthorized disclosure of, or unauthorized access to, information relating to the representation of a client.
 This Rule governs the disclosure by a lawyer of information relating to the representation of a client during the lawyer's representation of the client. See ER 1.18 for the lawyer's duties with respect to information provided to the lawyer by a prospective client, ER 1.9(c)(2) for the lawyer's duty not to reveal information relating to the lawyer's prior representation of a former client and ERs 1.8(b) and 1.9(c)(1) for the lawyer's duties with respect to the use of such information to the disadvantage of clients and former clients.
 A fundamental principle in the client-lawyer relationship is that, in the absence of the client's informed consent, the lawyer must not reveal information relating to the representation. See ER 1.0(e) for the definition of informed consent. This contributes to the trust that is the hallmark of the client-lawyer relationship. The public is better protected if full and open communication by the client is encouraged than if it is inhibited. The client is thereby encouraged to seek legal assistance and to communicate fully and frankly with the lawyer even as to embarrassing or legally damaging subject matter. The lawyer needs this information to represent the client effectively and, if necessary, to advise the client to refrain from wrongful conduct. Almost without exception, clients come to lawyers in order to determine their rights and what is, in the complex of laws and regulations, deemed to be legal and correct. Based upon experience, lawyers know that almost all clients follow the advice given, and the law is upheld.
 The principle of client-lawyer confidentiality is given effect by related bodies of law: the attorney-client privilege, the work product doctrine, and the rule of confidentiality established in professional ethics. The attorney-client privilege and work product doctrine apply in judicial and other proceedings in which a lawyer may be called as a witness or otherwise required to produce evidence concerning a client. The rule of client-lawyer confidentiality also applies in such situations where evidence is sought from the lawyer through compulsion of law. The confidentiality rule, for example, applies not only to matters communicated in confidence by the client but also to all information relating to the representation, whatever its source. A lawyer may not disclose such information except as authorized or required by the Rules of Professional Conduct or other law.
 Paragraph (a) prohibits a lawyer from revealing information relating to the representation of a client. This prohibition also applies to disclosures by a lawyer that do not in themselves reveal protected information but could reasonably lead to the discovery of such information by a third person. A lawyer's use of a hypothetical to discuss issues relating to the representation is permissible so long as there is no reasonable likelihood that the listener will be able to ascertain the identity of the client or the situation involved.
 Except to the extent that the client's instructions or special circumstances limit that authority, a lawyer is impliedly authorized to make disclosures about a client when appropriate in carrying out the representation some situations, for example, a lawyer may be impliedly authorized to admit a fact that cannot properly be disputed or, to make a disclosure that facilitates a satisfactory conclusion to a matter. Lawyers in a firm may, in the course of the firm's practice, disclose to each other information relating to a client of the firm, unless the client has instructed that particular information be confined to specified lawyers.
 The requirement of maintaining confidentiality of information relating to representation applies to government lawyers who may disagree with the policy goals that their representation is designed to advance.
Disclosure Adverse to Client
 Although the public interest is usually best served by a strict rule requiring lawyers to preserve the confidentiality of information relating to the representation of their clients, the confidentiality rule is subject to limited exceptions. Paragraph (b) recognizes the overriding value of life and physical integrity, and requires the lawyer to make a disclosure in order to prevent homicide or serious bodily injury that the lawyer reasonably believes is intended by a client. In addition, under paragraph (c), the lawyer has discretion to make a disclosure of the client's intention to commit a crime and the information necessary to prevent it. It is very difficult for a lawyer to "know" when such unlawful purposes will actually be carried out, for the client may have a change of mind.
 Paragraph (c) permits the lawyer to reveal the intention of the lawyer's client to commit a crime and the information necessary to prevent the crime. Paragraph (c) does not require the lawyer to reveal the intention of a client to commit wrongful conduct, but the lawyer may not counsel or assist a client in conduct the lawyer knows is criminal or fraudulent. See ER 1.2(d); see also ER 1.16 with respect to the lawyer's obligation or right to withdraw from the representation from the client in such circumstances. Where the client is an organization, the lawyer may be in doubt whether contemplated conduct will actually be carried out by the organization. Where necessary to guide conduct, in connection with this Rule, the lawyer may make inquiry within the organization as indicated in ER 1.13(b).
 The range of situations where disclosure is permitted by paragraph (d)(1) of the Rule is both broader and narrower than those encompassed by paragraph (c). Paragraph (c) permits disclosure only of a client's intent to commit a future crime, but is not limited to instances where the client seeks to use the lawyer's services in doing so. Paragraph (d)(1), on the other hand, applies to both crimes and frauds on the part of the client, and applies to both on-going conduct as well as that contemplated for the future. The instances in which paragraph (d)(1) would permit disclosure, however, are limited to those where the lawyer's services are or were involved, and where the resulting injury is to the financial interests or property of others. In addition to this Rule, a lawyer has a duty under ER 3.3 not to use false evidence.
 Paragraph (d)(2) addresses the situation in which the lawyer does not learn of the client's crime or fraud until after it has been consummated. Although the client no longer has the option of preventing disclosure by refraining from the wrongful conduct, there will be situations in which the loss suffered by the affected person can be rectified or mitigated. In such situations, the lawyer may disclose information relating to the representation to the extent necessary to enable the affected persons to mitigate reasonably certain losses or to attempt to recoup their losses. Paragraph (d)(2) does not apply when a person who has committed a crime or fraud thereafter employs a lawyer for representation concerning that offense.
 A lawyer's confidentiality obligations do not preclude a lawyer from securing confidential legal advice about the lawyer's personal responsibility to comply with these Rules. In most situations, disclosing information to secure such advice will be impliedly authorized for the lawyer to carry out the representation. Even when the disclosure is not impliedly authorized, paragraph (d)(3) permits such disclosure because of the importance of a lawyer's compliance with the Rules of Professional Conduct.
 Where a legal claim or disciplinary charge alleges complicity of the lawyer in a client's conduct or other misconduct of the lawyer involving representation of the client, the lawyer may respond to the extent the lawyer reasonably believes necessary to establish a defense. The same is true with respect to a claim involving the conduct or representation of a former client. Such a charge can arise in a civil, criminal, disciplinary or other proceeding and can be based on a wrong allegedly committed by the lawyer against the client or on a wrong alleged by a third person, for example, a person claiming to have been defrauded by the lawyer and client acting together. The lawyer's right to respond arises when an assertion of such complicity has been made. Paragraph (d)(4) does not require the lawyer to await the commencement of an action or proceeding that charges such complicity, so that the defense may be established by responding directly to a third party who has made such an assertion. The right to defend also applies, of course, where a proceeding has been commenced.
 A lawyer entitled to a fee is permitted by paragraph (d)(4) to prove the services rendered in an action to collect it. This aspect of the Rule expresses the principle that the beneficiary of a fiduciary relationship may not exploit it to the detriment of the fiduciary.
 Other law may require that a lawyer disclose information about a client. Whether such a law supersedes ER 1.6 is a question of law beyond the scope of these Rules. When disclosure of information relating to the representation appears to be required by other law, the lawyer must discuss the matter with the client to the extent required by ER 1.4. If, however, the other law supersedes this Rule and requires disclosure, paragraph (d)(5) permits the lawyer to make such disclosures as are necessary to comply with the law.
 Paragraph (d)(5) also permits compliance with a court order requiring a lawyer to disclose information relating to a client's representation. If a lawyer is called as a witness to give testimony concerning a client or is otherwise ordered to reveal information relating to the client's representation, however, the lawyer must, absent informed consent of the client to do otherwise and except for permissive disclosure under paragraphs (c) or (d), assert on behalf of the client all nonfrivolous claims that the information sought is protected against disclosure by this Rule, the attorney-client privilege, the work product doctrine, or other applicable law. In the event of an adverse ruling, the lawyer must consult with the client about the possibility of appeal. See ER 1.4. Unless review is sought, however, paragraph (d)(5) permits the lawyer to comply with the court's order.
 In situations not covered by the mandatory disclosure requirements of paragraph (b), paragraph (d)(6) permits discretionary disclosure when the lawyer reasonably believes disclosure is necessary to prevent reasonably certain death or substantial bodily harm.
 Paragraph (d)(7) recognizes that lawyers in different firms may need to disclose limited information to each other to detect and resolve conflicts of interest, such as when a lawyer is considering an association with another firm, two or more firms are considering a merger, or a lawyer is considering the purchase of a law practice. See ER 1.17, Comment . Under these circumstances, lawyers and law firms are permitted to disclose limited information, but only when there is a reasonable possibility that a new relationship might be established. Any such disclosure should ordinarily include no more than the identity of the persons and entities involved in a matter, a brief summary of the general issues involved, and information about whether the matter has terminated. Even this limited information, however, should be disclosed only to the extent reasonably necessary to detect and resolve conflicts of interest that might arise from the possible new relationship. Moreover, the disclosure of any information is prohibited if it would compromise the attorney-client privilege or otherwise prejudice the client (e.g., the fact that a corporate client is seeking advice on a corporate takeover that has not been publicly announced; that a person has consulted a lawyer about the possibility of divorce before the person's intentions are known to the person's spouse; or that a person has consulted a lawyer about a criminal investigation that has not led to a public charge). Under those circumstances, paragraph (a) prohibits disclosure unless the client or former client gives informed consent. A lawyer's fiduciary duty to the lawyer's firm may also govern a lawyer's conduct when exploring an association with another firm and is beyond the scope of these ERs.
 Any information disclosed pursuant to paragraph (d)(7) may be used or further disclosed only to the extent necessary to detect and resolve conflicts of interest. Paragraph (d)(7) does not restrict the use of information acquired by means independent of any disclosure pursuant to paragraph (d)(7). Paragraph (d)(7) also does not affect the disclosure of information within a law firm when the disclosure is otherwise authorized, see Comment , such as when a lawyer in a firm discloses information to another lawyer in the same firm to detect and resolve conflicts of interest that could arise in connection with undertaking a new representation.
 Paragraph (d) permits disclosure only to the extent the lawyer reasonably believes the disclosure is necessary to accomplish one of the purposes specified. Where practicable, the lawyer should first seek to persuade the client to take suitable action to obviate the need for disclosure. In any case, a disclosure adverse to the client's interest should be no greater than the lawyer reasonably believes necessary to accomplish the purpose. If the disclosure will be made in connection with a judicial proceeding, the disclosure should be made in a manner that limits access to the information to the tribunal or other persons having a need to know it and appropriate protective orders or other arrangements should be sought by the lawyer to the fullest extent practicable.
 Paragrach (d) permits but does not require the disclosure of information relating to a client's representation to accomplish the purposes specified in paragraphs (d)(1) through (d)(5). In exercising the discretion conferred by this Rule, the lawyer may consider such factors as the nature of the lawyer's relationship with the client and with those who might be injured by the client, the lawyer's own involvement in the transaction and factors that may extenuate the conduct in question. A lawyer's decision not to disclose as permitted by paragraph (d) does not violate this Rule. Disclosure may be required, however, by other Rules. Some Rules require disclosure only if such disclosure would be permitted by this Rule. See ERs1.2(d), 4.1(b), 8.1 and 8.3. ER 3.3, on the other hand, requires disclosure in some circumstances regardless of whether such disclosure is permitted by this Rule. See ER 3.3(b).
 If the lawyer's services will be used by the client in materially furthering a course of criminal or fraudulent conduct, the lawyer must withdraw, as stated in ER 1.16(a)(1). After withdrawal the lawyer is required to refrain from making disclosure of the client's confidences, except as otherwise provided in ER 1.6. Neither this Rule nor ER 1.8(b) nor ER 1.16(d) prevents the lawyer from giving notice of the fact of withdrawal, and the lawyer may also withdraw or disaffirm any opinion, document, affirmation, or the like.
Acting Competently to Preserve Confidentiality
 Paragraph (e) requires a lawyer to act competently to safeguard information relating to the representation of a client against unauthorized access by third parties and against inadvertent or unauthorized disclosure by the lawyer or other persons who are participating in the representation of the client or who are subject to the lawyer's supervision. See ERs 1.1, 5.1 and 5.3. The unauthorized access to, or the inadvertent or unauthorized disclosure of, information relating to the representation of a client does not constitute a violation of paragraph (e) if the lawyer has made reasonable efforts to prevent the access or disclosure. Factors to be considered in determining the reasonableness of the lawyer's efforts include, but are not limited to, the sensitivity of the information, the likelihood of disclosure if additional safeguards are not employed, the cost of employing additional safeguards, the difficulty of implementing the safeguards, and the extent to which the safeguards adversely affect the lawyer's ability to represent clients (e.g., by making a device or important piece of software excessively difficult to use). A client may require the lawyer to implement special security measures not required by this ER or may give informed consent to forgo security measures that would otherwise be required by this ER. Whether a lawyer may be required to take additional steps to safeguard a client's information in order to comply with other law, such as state and federal laws that govern data privacy or that impose notification requirements upon the loss of, or unauthorized access to, electronic information, is beyond the scope of these ERs. For a lawyer's duties when sharing information with nonlawyers outside the lawyer's own firm, see ER 5.3, Comments –.
 When transmitting a communication that includes information relating to the representation of a client, the lawyer must take reasonable precautions to prevent the information from coming into the hands of unintended recipients. This duty, however, does not require that the lawyer use special security measures if the method of communication affords a reasonable expectation of privacy. Special circumstances, however, may warrant special precautions. Factors to be considered in determining the reasonableness of the lawyer's expectation of confidentiality include the sensitivity of the information and the extent to which the privacy of the communication is protected by law or by a confidentiality agreement. A client may require the lawyer to implement special security measures not required by this ER or may give informed consent to the use of a means of communication that would otherwise be prohibited by this ER. Whether a lawyer may be required to take additional steps in order to comply with other law, such as state and federal laws that govern data privacy, is beyond the scope of these ERs.
 The duty of confidentiality continues after the client-lawyer relationship has terminated. See ER 1.9(c)(2). See ER 1.9(c)(1) for the prohibition against using such information to the disadvantage of the former client.