---
kind: "section"
citation: "37 C.F.R. § 42.8"
title: "37"
number: "42.8"
heading: "Mandatory notices."
url: "https://uscodex.org/cfr/37/42.8"
---

# §42.8. Mandatory notices.

- (a) Each notice listed in [paragraph (b)](#b) of this section must be filed with the Board:
  - (1) By the petitioner, as part of the petition;
  - (2) By the patent owner, or applicant in the case of derivation, within 21 days of service of the petition; or
  - (3) By either party, within 21 days of a change of the information listed in [paragraph (b)](#b) of this section stated in an earlier paper.
- (b) Each of the following notices must be filed:
  - (1) **Real party-in-interest.** Identify each real party-in-interest for the party.
  - (2) **Related matters.** Identify any other judicial or administrative matter that would affect, or be affected by, a decision in the proceeding.
  - (3) **Lead and back-up counsel.** If the party is represented by counsel, then counsel must be identified.
  - (4) **Service information.** Identify (if applicable):
    - (i) An electronic mail address;
    - (ii) A postal mailing address;
    - (iii) A hand-delivery address, if different than the postal mailing address;
    - (iv) A telephone number; and
    - (v) **A facsimile number.**

## Notes

### Authority

Authority: 35 U.S.C. 2(b)(2), 3, 6, 21, 23, 41, 134, 135, 143, 153, 311, 312, 314, 316, 318, 321-326, 328; Pub. L. 112-29, 125 Stat. 284; and Pub. L. 112-274, 126 Stat. 2456.

### Source

Source: 77 FR 48669, Aug. 14, 2012, unless otherwise noted.