Wash. R. Prof'l. Cond. 4.4
 Responsibility to a client requires a lawyer to subordinate the interests of others to those of the client, but that responsibility does not imply that a lawyer may disregard the rights of third persons. It is impractical to catalogue all such rights, but they include legal restrictions on methods of obtaining evidence from third persons and unwarranted intrusions into privileged relationships, such as the client-lawyer relationship.
 Paragraph (b) recognizes that lawyers sometimes receive a document or electronically stored information that was mistakenly sent or produced by opposing parties or their lawyers. A document or electronically stored information is inadvertently sent when it is accidentally transmitted, such as when an e-mail or letter is misaddressed or a document or electronically stored information is accidentally included with information was intentionally transmitted. If a lawyer knows or reasonably should know that such a document or electronically stored information was sent inadvertently, then this Rule requires the lawyer to promptly notify the sender in order to permit that person to take protective measures. Whether the lawyer is required to take additional steps, such as returning the document or electronically stored information, is a matter of law beyond the scope of these Rules, as is the question of whether the privileged status of a document or electronically stored information has been waived. Similarly, this rule does not address the legal duties of a lawyer who receives a document or electronically stored information that the lawyer knows or reasonably should know may have been inappropriately obtained by the sending person. For purposes of this rule, "document or electronically stored information " includes in addition to paper documents, e-mail and other forms of electronically stored information, including embedded data (commonly referred to as "metadata"), that is subject to being read or put into readable form. Metadata in electronic documents creates an obligation under this Rule only if the receiving lawyer knows or reasonably should know that the metadata was inadvertently sent to the receiving lawyer.
[Comment [ amended effective September 1, 2016.]
 Some lawyers may choose to return a document unread, for example, when the lawyer learns before receiving the document that it was inadvertently sent to the wrong address. Where a lawyer is not required by applicable law to do so, the decision to voluntarily return such a document is a matter of professional judgment ordinarily reserved to the lawyer. See Rules 1.2 and 1.4.
[Comments adopted effective September 1, 2006; September 1, 2016.]
Additional Washington Comments [4-5]
 The duty imposed by paragraph (a) of this Rule includes a lawyer's assertion or inquiry about any person's immigration status when the lawyer's purpose is to intimidate, coerce, or obstruct that person from participating in a civil or criminal matter, or otherwise assist with civil immigration enforcement. Issues involving immigration status carry a significant danger of interfering with the proper functioning of the justice system. See Salas v. Hi-Tech Erectors, 168 Wn.2d 664, 230 P.3d 583 (2010). When a lawyer is representing a client, whether the client is the State or one of its nolitical subdivisions, an organization, or an individual, a lawyer's communication to a party or a witness that the lawyer will report that person to immigration authorities, or a lawyer's report of that person to immigration authorities, furthers no substantial purpose of the adjudicative system and violates this Rule. A communication in violation of this Rule can also occur by an implied assertion that is the equivalent of an express assertion prohibited by paragraph (a). Sharing personal information with federal immigration authorities, including but not limited to. home address, court hearing dates, citizenshin or immigration status, or place of birth, absent a court order, for the purpose of facilitating civil immigration arrests is conduct that is in violation of this Rule. See also Rules 1.6(a) (prohibiting a lawyer from revealing information relating to the representation of a clienf), 8.4(b) (prohibiting criminal acts that reflect adversely on a lawyer's honesty, trustworthiness, or fitness as a lawyer in other respects), 8.4(d) (prohibiting conduct prejudicial to the administration of justice), and 8.4(h) (prohibiting conduct that is prejudicial to the administration of justice toward judges, lawyers, LLLTs, other parties, witnesses, jurors, or court personnel or officers, that a reasonable person would interpret as manifesting prejudice or bias on the basis of sex, race, age, creed, religion, color, national origin, immigration status, disability, sexual orientation, or marital status).
Government officials may provide federal immigration authorities with information relating to any person involved in matters before a court only pursuant to chapter 7.98 RCW. or upon request and in the same manner and to the same extent as such information is lawfully made available to the general public, or pursuant to a court order. Additionally, under 8 U.S.C. § 1373. government officials are not prohibited from sending to-or receiving from immigration authorities a person's immigration status or citizenship. Lawyers employed by federal immigration authorities engaged in authorized activities within the scope of lawful duties shall not be deemed in violation of this rule.
[Comment  adopted effective August 20, 2013.]
 A risk of unwarranted intrusion into a privileged relationship may arise when a lawyer deals with a person who is assisted by an LLLT. Although a lawyer may communicate directly with a person who is assisted by an LLLT, see Rule 4.2 Comment , client-LLLT communications are privileged to the same extent as client-lawyer communications. See APR 28K(3). An LLLT's ethical duty of confidentiality further protects the LLLT client's right to confidentiality in that professional relationship, see LLLT RPC 1.6(a). When dealing with a person who is assisted by an LLLT, a lawyer must respect these legal rights that protect the client-LLLT relationship.
[Comment  adopted effective April 14, 2015.]