25 U.S.C. § 88: False vouchers, accounts, or claims

Any disbursing or other officer of the United States, or other person, who shall knowingly present, or cause to be presented, any voucher, account, or claim to any officer of the United States, for approval or payment, or for the purpose of securing a credit in any account with the United States, relating to any matter pertaining to the Indian Service, which shall contain any material misrepresentation of fact in regard to the amount due or paid, the name or character of the article furnished or received; or of the service rendered, or to the date of purchase, delivery, or performance of service, or in any other particular, shall not be entitled to payment or credit for any part of said voucher, account, or claim; and if any such credit shall be given or received, or payment made, the United States may recharge the same to the officer or person receiving the credit or payment, and recover the amount from either or from both, in the same manner as other debts due the United States are collected: Provided , That where an account contains more than one voucher the foregoing shall apply only to such vouchers as contain the misrepresentation: And provided further , That the officers and persons by and between whom the business is transacted shall, in all civil actions in settlement of accounts, be presumed to know the facts in relation to the matter set forth in the voucher, account, or claim: And provided further , That the foregoing shall be in addition to the penalties prescribed by law, and in no way affect proceedings under existing law for like offenses. Where practicable this section shall be printed on the blank forms of vouchers provided for general use.