If you find buried treasure, you usually cannot simply keep it. Ownership turns on what the item is, where it was found, and whether anyone — an original owner, a landowner, or the government — still has a claim. In most situations, the law gives someone else the stronger position long before it rewards the finder, and even when you do end up with the item, you owe federal tax on its value and may have to follow state reporting steps first.
Who Has the Stronger Claim
Common law sorts found property into four categories, and the category decides who wins. It has nothing to do with how valuable the item is.
- Lost property is something the owner parted with accidentally. The finder has rights against everyone except the true owner.
- Mislaid property is something the owner intentionally set down and forgot. The owner of the place where it was found holds it for the true owner and outranks the finder.
- Abandoned property is something the owner intentionally gave up. The finder can take full ownership.
- Treasure trove is gold, silver, coins, or currency intentionally hidden long ago by an owner now unknown or dead. Historically this went to the finder; most states have abolished that rule and now treat these finds like lost or mislaid property, which gives the landowner the superior claim.
Sorting a real-world find into one of these boxes is the hard part. A jar of coins buried in a yard could fit any of three categories depending on facts no one can reconstruct a century later. Courts look at the item’s condition, how it was concealed, its age, and the surrounding circumstances. When the evidence is ambiguous, the landowner usually wins.
Where You Found It Changes Who Owns It
The same gold coin produces completely different legal outcomes depending on the ground it came out of.
Your Own Land
This is the strongest position a finder can occupy. Property law presumes a landowner owns what is in and on their land, so you hold a superior claim against everyone except the original owner. For old items embedded in the soil, where no living person can claim original ownership, courts have consistently sided with the landowner.
Someone Else’s Private Land
The analysis shifts sharply the moment you cross a property line. A trespasser has no legal claim to anything found. Even lawful visitors face an uphill battle: mislaid items are held by the landowner for the true owner, and even for lost items courts often give the landowner priority when the object was buried or attached to the soil rather than lying on the surface.
Government Land
Items found on federal or state land belong to the government. Public lands are managed for everyone, and the resources on them are public property. Removing artifacts, historical objects, or natural resources without authorization is prohibited under several federal statutes, with the specific rules set by the agency managing the land.
Federal Laws That Override Everything
Several federal statutes replace common law entirely for specific categories of discoveries. Penalties are serious enough that they overshadow whatever a find is worth.
Archaeological Resources Protection Act
ARPA makes it illegal to excavate, remove, or damage archaeological resources on federal or tribal land without a permit. The law covers any material remains of past human life that are at least 100 years old: pottery, tools, structures, rock carvings, and human skeletal materials. A first offense carries up to a $10,000 fine or one year in prison, rising to $20,000 and two years when the archaeological or commercial value plus restoration costs exceeds $500. A second conviction can bring up to $100,000 in fines or five years in prison.1Office of the Law Revision Counsel. 16 USC Ch. 1B Archaeological Resources Protection – Section 470ee The law targets unauthorized excavation itself, not just intentional looting, so not knowing an item was protected is not a defense.
Native American Graves Protection and Repatriation Act
NAGPRA governs the discovery of Native American cultural items on federal and tribal land, including human remains and funerary objects. If you find such items, you must stop all activity in the area, protect what is there, and notify both the relevant federal agency and the appropriate tribal authority in writing. Work cannot resume for at least 30 days after official notification is confirmed.2Office of the Law Revision Counsel. 25 USC Chapter 32 – Native American Graves Protection and Repatriation – Section 3002 Ownership follows a priority system starting with lineal descendants. Trafficking in Native American human remains or cultural items obtained in violation of NAGPRA is a federal crime, punishable by up to a year and a day in prison for a first offense and up to ten years for later violations.3National Park Service. Enforcement – Native American Graves Protection and Repatriation
Shipwrecks
The Abandoned Shipwreck Act of 1988 gives the federal government title to abandoned shipwrecks embedded in state submerged lands, listed or eligible for the National Register on those lands, or embedded in state-protected coralline formations, then transfers that title to the state where the wreck lies.4Office of the Law Revision Counsel. 43 USC Ch. 39 Abandoned Shipwrecks – Section 2103 You cannot salvage one in state waters without the state’s permission.
Military vessels and aircraft are treated differently again. Under the Sunken Military Craft Act, right, title, and interest in any U.S. sunken military craft is never extinguished except by express divestiture, so these wrecks are never considered abandoned.5Federal Register. Guidelines for Permitting Archaeological Investigations and Other Activities Directed at Sunken Military Craft The same principle applies to foreign military craft under international law. Unauthorized disturbance carries civil penalties of up to $100,000 per violation, with each day of continuing violation counted separately, plus seizure of the vessel used and the full cost of restoration and lost archaeological information.6eCFR. 32 CFR Part 767 Subpart A – Regulations and Obligations
Reporting Duties and Criminal Exposure
Most states make it illegal to keep found property without a reasonable effort to locate the owner. The offense goes by different names — theft of lost property, larceny by finding, theft by appropriation — but the elements line up: you came into possession of something you knew or should have known belonged to someone else, and you kept it without trying to return it.
Consequences vary. In some states, keeping found property above a few hundred dollars in value is a felony. In others, failing to report a find is a misdemeanor carrying fines or short jail time. Many states layer on specific procedures: turn the item over to local law enforcement, publish newspaper notices, wait through a statutory holding period, typically 90 days to six months, before claiming ownership. Skipping those steps can both void your claim and create criminal exposure. Simply finding something and not immediately knowing what to do is not a crime; the problem starts when you decide to keep it and make no effort to find the owner.
Specific thresholds, timelines, and reporting duties vary by state, so the local statute controls. Documenting your efforts — a police report, posted notices, written contact with the landowner — protects you against both criminal charges and later civil claims by someone asserting ownership.
Taxes on What You Find
This is where people get tripped up. Federal tax regulations classify treasure trove as gross income in the year you take undisputed possession of it.7eCFR. 26 CFR 1.61-14 – Miscellaneous Items of Gross Income If you find a box of gold coins worth $50,000 on a Tuesday afternoon, the IRS considers you $50,000 richer that tax year, even if you never sell a single coin.
Found property is taxed as ordinary income at your regular rate, not at the lower capital gains rate. You report the fair market value measured at the time you took possession: for cash that is straightforward, and for objects like jewelry, coins, or artifacts you need to establish what a knowledgeable buyer would pay a knowledgeable seller in an open market. A professional appraisal is worth paying for because the IRS can challenge a low valuation.
If you later sell the item for more than the value you reported, the difference is a capital gain. If you sell it for less, you may be able to claim a loss. The initial tax hit, though, is unavoidable. People who pocket valuable finds without reporting them are not getting away with anything; they are adding tax evasion to their other problems.
Metal Detecting Rules
Metal detecting is one of the most common ways people stumble into trouble over found objects, because the rules change with the agency managing the land.
National Parks
Metal detectors are flatly prohibited. Federal regulations ban possessing or using a metal detector, magnetometer, or similar device within park boundaries, with narrow exceptions for equipment broken down and packed so it cannot be used, navigation equipment for boats and aircraft, and devices authorized for scientific or administrative purposes.8eCFR. 36 CFR 2.1 – Preservation of Natural, Cultural and Archeological Resources A working detector cannot be brought into a national park even if you never switch it on.
BLM Land
Bureau of Land Management land is more permissive. You can use a metal detector and prospect for minerals like gold and silver with hand tools for personal use. But there is a hard line between mineral prospecting and artifact collecting. Cultural materials — arrowheads, stone tools, grinding stones, pottery, old bottles, historic coins — cannot be removed, damaged, or disturbed without a BLM permit. Modern coins and currency are fair game; anything with historical significance is off limits. Historic sites like old cabins, mining areas, and town sites are closed to collecting entirely.9Bureau of Land Management. Can I Keep This? A Guide to Collecting on Public Lands
State Parks and Other Public Land
State park rules vary widely. Some allow metal detecting in designated areas, others require permits, and some ban it outright. Army Corps of Engineers land generally permits detecting but restricts it to specific areas like swim beaches, and anything found above a nominal value threshold must be turned in to a park ranger. Check the specific regulations for the property before you head out. An honest mistake about jurisdiction can still result in fines and confiscation of equipment.
What to Do in the First Hours After a Find
The instinct to grab the object and sort the rest out later is almost always wrong. How you handle the first few hours decides whether you have any legal claim at all.
- Leave it where it is. Moving an object destroys the archaeological context that experts use to understand its history and value, and on federal or tribal land, moving it without authorization is a federal crime.
- Document everything. Photograph the item from several angles with a common object for scale. Record GPS coordinates. Note the date, time, depth, and soil conditions. The record protects you legally and preserves information that is lost once the site is disturbed.
- Figure out who owns the land. Private, public, or tribal land each lead to different next steps. For public land, identify the specific managing agency, because each has its own procedures.
- Report the find. Notify the landowner on private land, or the managing agency on public land. If your state requires reporting found property to law enforcement, do it promptly. The paper trail supports your claim if no owner comes forward.
- Get a professional appraisal. For anything that might be valuable, hire a qualified appraiser to establish fair market value. You will need the number for tax purposes whether you keep the item, sell it, or surrender it. An appraiser with credentials from a recognized professional organization carries more weight with the IRS and the courts than your own estimate.
- Talk to a lawyer before spending or selling. A significant find raises overlapping questions on property rights, taxes, cultural heritage protections, and state reporting duties. A property attorney can tell you where you stand before you make a move you cannot undo.