---
kind: "section"
citation: "20 C.F.R. § 355.8"
title: "20"
number: "355.8"
heading: "Service of complaint."
url: "https://uscodex.org/cfr/20/355.8"
---

# §355.8. Service of complaint.

- (a) Service of a complaint must be made by certified or registered mail or by delivery in any manner authorized by [Rule 4(d)](/cfr/20/4.md?p=d) of the Federal Rules of Civil Procedure.
- (b) Proof of service, stating the name and address of the person on whom the complaint was served, and the manner and date of service, may be made by—
  - (1) Affidavit of the individual making service;
  - (2) An acknowledged U.S. Postal Service return receipt card; or
  - (3) **Written acknowledgment of the respondent.**

## Notes

### Authority

Authority: 31 U.S.C. 3809; sec. 5203, Pub. L. 118-159, 138 Stat. 1773.

### Source

Source: 52 FR 47706, Dec. 16, 1987, as amended at 90 FR 25144, June 16, 2025, unless otherwise noted.