---
kind: "section"
citation: "39 U.S.C. § 3681"
title: "39"
title_heading: "Postal Service"
number: "3681"
heading: "Reimbursement"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/39/3681"
units:
  - "Part IV — Mail Matter"
  - "Chapter 36 — Postal Rates, Classes, and Services"
  - "Subchapter VI — General"
---

# §3681. Reimbursement


No mailer may be reimbursed for any amount paid under any rate or fee which, after such payment, is determined to have been unlawful after proceedings in accordance with the provisions of sections [3662](/usc/39/3662.md) through [3664](/usc/39/3664.md) of this title, or is superseded by a lower rate or fee established under subchapter II of this chapter.


## Source credit

(Pub. L. 91–375, Aug. 12, 1970, 84 Stat. 764; Pub. L. 109–435, title X, § 1010(a), Dec. 20, 2006, 120 Stat. 3261.)

## Notes

### Editorial Notes

### Amendments

2006—Pub. L. 109–435 substituted “sections 3662 through 3664” for “section 3628”.

### Statutory Notes and Related Subsidiaries

### Effective Date

Section effective Jan. 20, 1971, pursuant to Resolution No. 71–10 of the Board of Governors. See section 15(a) of Pub. L. 91–375, set out as a note preceding section 101 of this title.