---
kind: "section"
citation: "31 C.F.R. § 601.4"
title: "31"
number: "601.4"
heading: "Distinctive counterfeit deterrents."
url: "https://uscodex.org/cfr/31/601.4"
---

# §601.4. Distinctive counterfeit deterrents.


The distinctive counterfeit deterrents that may be used in the denominations of United States Federal Reserve notes as prescribed by the Secretary of the Treasury are:

- (a) Security threads containing graphics consisting of the designation “USA” and the denomination of the currency note, expressed in alphabetic or numeric characters.
- (b) **Optically variable inks with material characteristics.**
- (c) **Non-visual characteristic inks with material characteristics.**
- (d) Optically variable thread (three-dimensional (3-D) security ribbon and micro-optic stripe) visible in front or back of the currency note.
- (e) **Non-visual characteristic features with material characteristics.**

## Notes

### Authority

Authority: 5 U.S.C. 301; 12 U.S.C. 418, 421; 18 U.S.C. 474A; 31 U.S.C. 321.

### Source

Source: 88 FR 43063, July 6, 2023, unless otherwise noted.