---
kind: "section"
citation: "22 C.F.R. § 521.8"
title: "22"
number: "521.8"
heading: "Service of complaint."
url: "https://uscodex.org/cfr/22/521.8"
---

# §521.8. 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/22/4.md?p=d) of the Federal Rules of Civil Procedure. Service is complete upon receipt.
- (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 serving the complaint by delivery;
  - (2) A United States Postal Service return receipt card acknowledging receipt; or
  - (3) **Written acknowledgment of receipt by the defendant or the defendant's representative.**
  - (4) In case of service abroad authenticated in accordance with the Convention on the Service Abroad of Judicial and Extra Judicial Documents in Civil or Commercial Matters.

## Notes

### Authority

Authority: 22 U.S.C. 2658; 31 U.S.C. 3801-3812.

### Source

Source: 56 FR 25028, June 3, 1991, unless otherwise noted.