Following are some important excerpts from the U.S. Code, Title 18, “Crimes and Criminal Procedure,” applicable to coins and precious metals bars. They deal with counterfeiting of coins and dies as well as fraudulently altering and defacing U.S. and foreign coins.
U.S. Code Title 18, Part I, Chapter 17
§ 331 - Mutilation, diminution, and falsification of coins
Whoever fraudulently alters, defaces, mutilates, impairs, diminishes, falsifies, scales, or lightens any of the coins coined at the mints of the United States, or any foreign coins which are by law made current or are in actual use or circulation as money within the United States; or
Whoever fraudulently possesses, passes, utters, publishes, or sells, or attempts to pass, utter, publish, or sell, or brings into the United States, any such coin, knowing the same to be altered, defaced, mutilated, impaired, diminished, falsified, scaled, or lightened—
Shall be fined under this title or imprisoned not more than five years, or both.
§ 332 - Debasement of coins; alteration of official scales, or embezzlement of metals
If any of the gold or silver coins struck or coined at any of the mints of the United States shall be debased, or made worse as to the proportion of fine gold or fine silver therein contained, or shall be of less weight or value than the same ought to be, pursuant to law, or if any of the scales or weights used at any of the mints or assay offices of the United States shall be defaced, altered, increased, or diminished through the fault or connivance of any officer or person employed at the said mints or assay offices, with a fraudulent intent; or if any such officer or person shall embezzle any of the metals at any time committed to his charge for the purpose of being coined, or any of the coins struck or coined at the said mints, or any medals, coins, or other moneys of said mints or assay offices at any time committed to his charge, or of which he may have assumed the charge, every such officer or person who commits any of the said offenses shall be fined under this title or imprisoned not more than ten years, or both.
U.S. Code Title 18, Part I, Chapter 25
§ 485 – Coins or bars
Whoever falsely makes, forges, or counterfeits any coin or bar in resemblance or similitude of any coin of a denomination higher than 5 cents or any gold or silver bar coined or stamped at any mint or assay office of the United States, or in resemblance or similitude of any foreign gold or silver coin current in the United States or in actual use and circulation as money within the United States; or
Whoever passes, utters, publishes, sells, possesses, or brings into the United States any false, forged, or counterfeit coin or bar, knowing the same to be false, forged, or counterfeit, with intent to defraud any body politic or corporate, or any person, or attempts the commission of any offense described in this paragraph—
Shall be fined under this title or imprisoned not more than fifteen years, or both
§ 486 – Uttering coins of gold, silver or other metal
Whoever, except as authorized by law, makes or utters or passes, or attempts to utter or pass, any coins of gold or silver or other metal, or alloys of metals, intended for use as current money, whether in the resemblance of coins of the United States or of foreign countries, or of original design, shall be fined under this title or imprisoned not more than five years, or both.
§ 487 - Making or possessing counterfeit dies for coins
Whoever, without lawful authority, makes any die, hub, or mold, or any part thereof, either of steel or plaster, or any other substance, in likeness or similitude, as to the design or the inscription thereon, of any die, hub, or mold designated for the coining or making of any of the genuine gold, silver, nickel, bronze, copper, or other coins coined at the mints of the United States; or
Whoever, without lawful authority, possesses any such die, hub, or mold, or any part thereof, or permits the same to be used for or in aid of the counterfeiting of any such coins of the United States —
Shall be fined under this title or imprisoned not more than fifteen years, or both.
§ 488 - Making or possessing counterfeit dies for foreign coins
Whoever, within the United States, without lawful authority, makes any die, hub, or mold, or any part thereof, either of steel or of plaster, or of any other substance, in the likeness or similitude, as to the design or the inscription thereon, of any die, hub, or mold designated for the coining of the genuine coin of any foreign government; or
Whoever, without lawful authority, possesses any such die, hub, or mold, or any part thereof, or conceals, or knowingly suffers the same to be used for the counterfeiting of any foreign coin—
Shall be fined under this title or imprisoned not more than five years, or both.
§ 489 - Making or possessing likeness of coins
Whoever, within the United States, makes or brings therein from any foreign country, or possesses with intent to sell, give away, or in any other manner uses the same, except under authority of the Secretary of the Treasury or other proper officer of the United States, any token, disk, or device in the likeness or similitude as to design, color, or the inscription thereon of any of the coins of the United States or of any foreign country issued as money, either under the authority of the United States or under the authority of any foreign government shall be fined under this title.
§ 490 - Minor coins
Whoever falsely makes, forges, or counterfeits any coin in the resemblance or similitude of any of the one-cent and 5-cent coins minted at the mints of the United States; or
Whoever passes, utters, publishes, or sells, or brings into the United States, or possesses any such false, forged, or counterfeited coin, with intent to defraud any person, shall be fined under this title or imprisoned not more than three years, or both.
§ 491 - Tokens or paper used as money
(a) Whoever, being 18 years of age or over, not lawfully authorized, makes, issues, or passes any coin, card, token, or device in metal, or its compounds, intended to be used as money, or whoever, being 18 years of age or over, with intent to defraud, makes, utters, inserts, or uses any card, token, slug, disk, device, paper, or other thing similar in size and shape to any of the lawful coins or other currency of the United States or any coin or other currency not legal tender in the United States, to procure anything of value, or the use or enjoyment of any property or service from any automatic merchandise vending machine, postage-stamp machine, turnstile, fare box, coinbox telephone, parking meter or other lawful receptacle, depository, or contrivance designed to receive or to be operated by lawful coins or other currency of the United States, shall be fined under this title, or imprisoned not more than one year, or both.
(b) Whoever manufactures, sells, offers, or advertises for sale, or exposes or keeps with intent to furnish or sell any token, slug, disk, device, paper, or other thing similar in size and shape to any of the lawful coins or other currency of the United States, or any token, disk, paper, or other device issued or authorized in connection with rationing or food and fiber distribution by any agency of the United States, with knowledge or reason to believe that such tokens, slugs, disks, devices, papers, or other things are intended to be used unlawfully or fraudulently to procure anything of value, or the use or enjoyment of any property or service from any automatic merchandise vending machine, postage-stamp machine, turnstile, fare box, coinbox telephone, parking meter, or other lawful receptacle, depository, or contrivance designed to receive or to be operated by lawful coins or other currency of the United States shall be fined under this title or imprisoned not more than one year, or both.
Nothing contained in this section shall create immunity from criminal prosecution under the laws of any State, Commonwealth of Puerto Rico, territory, possession, or the District of Columbia.
(c) “Knowledge or reason to believe,” within the meaning of paragraph (b) of this section, may be shown by proof that any law-enforcement officer has, prior to the commission of the offense with which the defendant is charged, informed the defendant that tokens, slugs, disks, or other devices of the kind manufactured, sold, offered, or advertised for sale by him or exposed or kept with intent to furnish or sell, are being used unlawfully or fraudulently to operate certain specified automatic merchandise vending machines, postage-stamp machines, turnstiles, fare boxes, coin-box telephones, parking meters, or other receptacles, depositories, or contrivances, designed to receive or to be operated by lawful coins of the United States.
§ 492 - Forfeiture of counterfeit paraphernalia
All counterfeits of any coins or obligations or other securities of the United States or of any foreign government, or any articles, devices, and other things made, possessed, or used in violation of this chapter or of sections 331-333, 335, 336, 642 or 1720, of this title, or any material or apparatus used or fitted or intended to be used, in the making of such counterfeits, articles, devices or things, found in the possession of any person without authority from the Secretary of the Treasury or other proper officer, shall be forfeited to the United States.
Whoever, having the custody or control of any such counterfeits, material, apparatus, articles, devices, or other things, fails or refuses to surrender possession thereof upon request by any authorized agent of the Treasury Department, or other proper officer, shall be fined under this title or imprisoned not more than one year, or both.
Whenever, except as hereinafter in this section provided, any person interested in any article, device, or other thing, or material or apparatus seized under this section files with the Secretary of the Treasury, before the disposition thereof, a petition for the remission or mitigation of such forfeiture, the Secretary of the Treasury, if he finds that such forfeiture was incurred without willful negligence or without any intention on the part of the petitioner to violate the law, or finds the existence of such mitigating circumstances as to justify the remission or the mitigation of such forfeiture, may remit or mitigate the same upon such terms and conditions as he deems reasonable and just.
If the seizure involves offenses other than offenses against the coinage, currency, obligations or securities of the United States or any foreign government, the petition for the remission or mitigation of forfeiture shall be referred to the Attorney General, who may remit or mitigate the forfeiture upon such terms as he deems reasonable and just.