Bill of Sale — Firearm (Private Sale)

A Bill of Sale — Firearm (Private Sale) in the United States records the transfer of ownership of goods from a seller to a buyer and the price paid for them.

The federal legal framework governing private firearm sales derives primarily from the Gun Control Act of 1968 (GCA), codified at 18 U.S.C. §§ 921–931, and the Brady Handgun Violence Prevention Act of 1993 (Pub. L. 103-159), which established the National Instant Criminal Background Check System (NICS). Under 18 U.S.C. § 922(a)(1), it is unlawful for any person other than a licensed dealer, manufacturer, or importer to engage in the business of dealing in firearms without a federal license. A private individual who occasionally sells firearms from their personal collection is not considered to be 'in the business' of dealing and is not required to conduct NICS background checks. However, 18 U.S.C. § 922(d) prohibits any person — including private sellers — from transferring a firearm to a person they know or have reasonable cause to believe is a prohibited person under 18 U.S.C. § 922(g).

The legal environment for private firearm transfers varies dramatically by state. At least 21 states, including California, Colorado, Illinois, Maryland, Nevada, New York, Oregon, and Washington, require all or most private firearm transfers to be processed through a licensed FFL dealer who runs a NICS background check. In these states, a private bill of sale alone does not complete a lawful transfer — the parties must involve an FFL. In states without universal background check requirements (including Texas, Florida, Arizona, and Georgia), private transfers between individuals who are not prohibited persons may be completed without FFL involvement, and the bill of sale is the primary documentation of the transaction.

The serial number is the single most important element of a firearm bill of sale. Under the Firearm Owners Protection Act of 1986 (18 U.S.C. § 922(k)), it is a federal crime to possess or transfer a firearm with an obliterated or removed serial number. Recording the serial number in the bill of sale confirms the firearm's identity and allows ATF tracing through the National Tracing Center in Martinsburg, West Virginia, if the firearm is used in a crime. A seller who documents the serial number and retains the bill of sale can demonstrate to law enforcement that the firearm left their possession on a specific date, potentially relieving them of liability for post-transfer criminal use.

For estate and inheritance purposes, a firearm bill of sale documents the transfer of firearms between decedents and heirs or purchasers. The ATF's guidance on interstate firearm transfers (ATF Ruling 2016-1) and 18 U.S.C. § 922(a)(2) exempt certain bequests to family members, but most interstate estate transfers still require FFL involvement. A bill of sale or estate transfer documentation provides clarity for all parties and for local law enforcement.

A Firearm Bill of Sale is needed in the United States in every private firearm transfer between individuals — whether or not state law requires it — to create a documented record of the transfer and protect both parties.

Private gun show transfers in states without universal background check requirements — including Texas, Florida, Arizona, Tennessee, and Pennsylvania — can legally proceed between private individuals without FFL involvement. In these states, a bill of sale is the only documentation of the transfer, and its absence leaves both parties vulnerable: the seller has no proof they transferred the gun before any post-sale crimes, and the buyer has no proof of legitimate acquisition if questioned by law enforcement.

Estate firearm transfers, when a gun owner dies and leaves firearms to heirs or when an estate executor sells firearms to buyers, require documentation for both probate accounting and ATF compliance. A bill of sale or estate transfer form establishes the transfer date, the parties, and the agreed value — essential for the estate's inventory of assets under the Uniform Probate Code (which most states have adopted in some form).

Insurance claims for stolen or damaged firearms require proof of ownership. NRA Insurance, Farmers Insurance, and standalone firearms insurance policies (such as those offered by USAA or Chubb) require the serial number, make, model, and purchase documentation when processing theft claims. A bill of sale provides this documentation for privately purchased firearms that do not have a dealer Form 4473 on file.

FFL-assisted private transfers in universal background check states (California, Colorado, Illinois, etc.) still benefit from a private bill of sale between the parties, in addition to the Form 4473 the FFL completes. The private bill of sale records the agreed price and condition terms between buyer and seller independently of the regulatory paperwork.

Out-of-state transfers through an FFL require documentation of the original transaction terms. When a seller ships a firearm to an FFL in the buyer's home state, the bill of sale documents the purchase price, the firearm's description, and the parties' agreement — the receiving FFL completes the Form 4473 independently.

A complete Firearm Bill of Sale for a US private transaction must contain several essential elements to be legally useful and to protect both the seller and buyer under federal and state law.

Firearm identification is the most critical section. The bill of sale must record the firearm's make (manufacturer name — e.g., Smith & Wesson, Glock, Sig Sauer, Ruger, Remington, Winchester); model name and model number; type (pistol, revolver, rifle, shotgun, semi-automatic, bolt action, etc.); caliber or gauge (e.g., 9mm, .45 ACP, .308 Winchester, 12 gauge); finish and stock description (stainless/blued, walnut/synthetic, etc.); and most importantly, the serial number. The serial number is the primary identifier used by the ATF's National Tracing Center for crime gun tracing. Any accessories transferred with the firearm — magazines, scopes, slings, cases, original box — should be listed.

Party identification requires the full legal names, residential addresses, and dates of birth of both seller and buyer. Some states require the buyer's driver's license number. The seller should represent that they are the lawful owner of the firearm and have the legal right to transfer it.

Buyer certification is a legally protective provision for the seller. The buyer should certify, under penalty of perjury, that they: are 21 years of age or older (for handguns) or 18 or older (for long guns); are a US citizen or lawful permanent resident; are not a prohibited person under 18 U.S.C. § 922(g) (not a convicted felon, domestic violence misdemeanant, subject to a qualifying restraining order, adjudicated mental defective, unlawful drug user, etc.); and are purchasing the firearm for their own use and not as a straw purchaser for another person (straw purchases violate 18 U.S.C. § 922(a)(6) and carry federal felony penalties). The seller cannot conduct an NICS check, so this written certification is the seller's primary good-faith protection.

Purchase price and date of sale complete the financial record of the transaction. Payment method (cash, check, electronic transfer) should be noted.

State-specific compliance provisions should address any state registration, reporting, or waiting period requirements. In California, the parties must process the transfer through an FFL — the bill of sale supplements but does not replace the DROS (Dealer Record of Sale) process. In New York, the transfer must comply with the NY SAFE Act requirements.

Signatures of both buyer and seller, dated, complete the document. Both parties should retain a copy permanently — the seller's copy protects against post-transfer liability, and the buyer's copy proves lawful acquisition.