31 C.F.R. § 100.19 Disposition of counterfeit notes and coins.
Title 31 - Money and Finance: Treasury
All counterfeit notes and coin found in remittances are cancelled and delivered to the U.S. Secret Service of the Department of the Treasury or to the nearest local office of that Service, a receipt for the same being forwarded to the sender. Communications with respect thereto should be addressed to the Director, U.S. Secret Service, Department of the Treasury, Washington, DC 20223.
Title 31: Money and Finance: Treasury
PART 100—EXCHANGE OF PAPER CURRENCY AND COIN
Subpart D—Other Information
§ 100.19 Disposition of counterfeit notes and coins.