37 CFR § 11.404 - Respect for rights of third persons.

---
identifier: "/us/cfr/t37/s11.404"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 11.404 - Respect for rights of third persons."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "11.404"
section_name: "Respect for rights of third persons."
chapter_name: "UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "11"
part_name: "REPRESENTATION OF OTHERS BEFORE THE UNITED STATES PATENT AND TRADEMARK OFFICE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "5 U.S.C. 500; 15 U.S.C. 1123; 35 U.S.C. 2(b)(2), 32, 41; Sec. 1, Pub. L. 113-227, 128 Stat. 2114."
regulatory_source: "69 FR 35452, June 24, 2004, unless otherwise noted."
cfr_part: "11"
---


# 11.404 Respect for rights of third persons.

(a) In representing a client, a practitioner shall not use means that have no substantial purpose other than to embarrass, delay, or burden a third person, or use methods of obtaining evidence that violate the legal rights of such a person.

(b) A practitioner who receives a document or electronically stored information relating to the representation of the practitioner's client and knows or reasonably should know that the document or electronically stored information was inadvertently sent shall promptly notify the sender.