What Happens If You Don’t Declare Cash at Customs?

Failing to declare more than $10,000 at the U.S. border is one of the most expensive mistakes a traveler can make — because the consequence is not a fine or a warning, it is the seizure of the entire sum. And it happens to people whose money is completely legitimate: savings, business income, a house sale, a gift. The good news is that seized cash can often be recovered with the right response. Here is what actually happens when you don’t declare, and what to do about it.

Why the Whole Amount Can Be Taken

The reporting requirement comes from the Bank Secrecy Act (31 U.S.C. 5316), and the seizure authority from 31 U.S.C. 5317. What surprises people most is that the source of the money is beside the point. In a failure-to-report case, the reportable event is simply moving more than $10,000 across the border without filing the form. Because the violation is the non-reporting itself, CBP does not need any evidence that the cash is connected to a crime in order to seize it. Legitimately earned money is seized under this authority every day.

That is also why the “but it’s my own money” argument, on its own, does not stop the seizure — though a documented legitimate source is central to getting it back.

What Happens at the Border

When CBP discovers unreported currency, the sequence is usually the same: the money is counted and seized, the traveler is questioned, and a custody receipt is issued for the funds. The traveler is almost always allowed to continue traveling — it is the money that is detained, not the person, in the typical civil case. In the weeks that follow, CBP sends a formal notice of seizure explaining the basis and the options for responding, along with a deadline.

The Penalties Beyond Losing the Cash

The seizure of the money is the immediate consequence, but not always the only one. Two related offenses can raise the stakes considerably. Concealing cash to evade the reporting requirement — hiding it in luggage, on the body, or in a vehicle — can be charged as bulk cash smuggling. Breaking the money into smaller amounts to dodge the $10,000 threshold is structuring. Both can carry criminal penalties on top of the civil forfeiture of the funds, which is why a failure-to-report case should never be treated as a minor paperwork slip.

Can You Get the Money Back? Usually, Yes

After the notice of seizure arrives, you choose how to proceed — typically between an administrative petition for remission or mitigation to CBP and a judicial claim that pushes the matter to federal court. That election, made on CBP’s election-of-proceedings form, is a strategic decision with real consequences, and the best path depends on the facts. Our guide to the best option to get seized cash back walks through the choice, and the case outcomes page shows how these matters have resolved.

What to Do If Your Cash Was Seized

1. Note the deadline on the seizure noticeYour response window runs from the date on the notice, and it is not generous. Mail delay shortens it further, so treat the clock as already running.
2. Gather source-of-funds documentationBank records, sale documents, business records, pay records — whatever proves where the money came from. This is the heart of getting it back.
3. Do not contact CBP to explain on your ownStatements become evidence. A clear, documented response through the right channel is far stronger than an off-the-cuff call.
4. Get the election of proceedings rightPetition or judicial claim is a strategic choice. Choosing before you understand the trade-offs can weaken an otherwise strong case.

If you declared and still lost your cash, or you simply did not know about the requirement, the situation is recoverable but time-sensitive. A customs and international trade lawyer can document the source of your funds, choose the right response, and pursue the return of the full amount. For the underlying rule and how the form works, see our FinCEN 105 reporting requirement page — and if you were planning ahead rather than reacting, what happens when you declare cash at customs covers the safe path.

Frequently Asked Questions

What happens if you don’t declare cash at customs?

CBP can seize the entire amount of unreported currency over $10,000, even if the money is legitimate, because the violation is the failure to report. It can also carry criminal exposure if the cash was concealed or structured. The seized money can often be recovered with a timely, documented response.

Can customs take all your money for not declaring it?

Yes. In a failure-to-report case, CBP can seize the full sum, not just the portion over $10,000. Because the reporting violation is the basis, the government does not have to prove the money came from a crime in order to seize it.

Is not declaring cash a crime?

The civil consequence is seizure and potential forfeiture of the funds. Beyond that, willfully failing to report, concealing cash to evade the requirement (bulk cash smuggling), or structuring to avoid the threshold can carry criminal penalties. The exposure depends on the facts.

How do I get back cash seized for not declaring it?

After the notice of seizure, you respond — usually by choosing between an administrative petition to CBP and a judicial claim in federal court. A documented legitimate source of funds and the right choice of proceedings are what drive a full return. Acting before the deadline is essential.