Detroit is the highest-volume currency enforcement port on the northern border and one of the most active in the entire country. The Detroit Field Office covers Detroit Metro Airport, the Ambassador Bridge, the Detroit-Windsor Tunnel, and the Blue Water Bridge in Port Huron — a combination of air and land border enforcement that has produced annual seizure totals as high as $7.8 million in a single fiscal year. Detroit ranks fourth nationally for currency seizure volume, behind only San Juan, Laredo, and San Diego. This article documents some of the largest and most notable currency seizures in the Detroit area and explains what makes this port one of the most consequential currency enforcement locations in the United States.
⚠️ Has CBP seized your cash in Detroit? If CBP has seized your currency at Detroit Metro Airport, the Ambassador Bridge, the Detroit-Windsor Tunnel, or the Blue Water Bridge, visit our Detroit currency seizure page for information on your options — or call us at (734) 855-4999 for a free consultation. Detroit is our home port and we have handled dozens of cases at every crossing in the Detroit Field Office.
Why Detroit Ranks Fourth Nationally for Currency Seizures
Detroit’s enforcement profile is distinctive among top-ranked ports because it combines two very different enforcement environments under a single field office. Detroit Metro Airport generates seizures from arriving international passengers — primarily from the Middle East, Africa, South Asia, and Europe — who failed to declare currency upon arrival. The land border crossings — the Ambassador Bridge, the Detroit-Windsor Tunnel, and the Blue Water Bridge — generate seizures from cross-border travelers carrying cash between the United States and Canada.
Detroit CBP has been unusually transparent about its enforcement statistics, publishing annual seizure totals and regularly issuing press releases documenting individual cases. That transparency reflects both an enforcement culture that takes the reporting requirement seriously and a deliberate public education strategy — Detroit CBP has stated explicitly that it publishes seizure statistics to deter future violations. The Detroit Field Office’s social media presence — particularly the use of Twitter/X to publicize individual seizures — is more active than almost any other field office in the country.
Notable Large Currency Seizures at Detroit Metro Airport
$15,000 Seized — Detroit Airport, 2025
CBP at Detroit Metro Airport seized $15,000 in unreported currency from a traveler in 2025 — one of many individual airport seizures that contribute to Detroit’s annual totals. Airport seizures at Detroit tend to involve travelers arriving on international flights from the Middle East and Africa who are carrying cash for family support, real estate transactions, or business purposes and who did not file the required FinCEN 105. The amounts in individual airport cases at Detroit typically range from $11,000 to $80,000 — close to the reporting threshold on the low end, with occasional larger seizures from travelers carrying substantial sums.
$459,000 Seized from 25 Travelers — October 2024
CBP at Detroit Metro Airport seized $459,000 from 25 travelers during the month of October 2024 — an average of approximately $18,360 per seizure. This monthly total reflects the sustained, high-volume enforcement environment at Detroit Metro. The 25-traveler figure in a single month is notable — it represents 25 separate families or individuals who lost their cash at Detroit Metro that month and must now navigate CBP’s administrative process to recover it. The Detroit Field Office’s annual totals — consistently in the millions of dollars — are built from this kind of month-to-month enforcement activity rather than occasional headline-grabbing individual cases.
Notable Large Currency Seizures at the Ambassador Bridge
$230,000 Seized at the Ambassador Bridge
The Ambassador Bridge connecting Detroit to Windsor, Ontario has been the site of numerous significant currency seizures. A $230,000 seizure at the Ambassador Bridge — one of many large land border cases documented in Detroit CBP press releases — reflects the enforcement environment at what is the busiest commercial border crossing in North America. The Ambassador Bridge handles approximately 25% of all U.S.-Canada trade by value, and the volume of both commercial and passenger traffic creates a significant enforcement backdrop for currency operations.
$1 Million+ Seized at the Blue Water Bridge — Port Huron
One of the largest single seizures in Detroit Field Office history occurred at the Blue Water Bridge in Port Huron — more than $1 million in currency seized in a single enforcement action. Cases of this scale at land border crossings almost always involve judicial forfeiture review at CBP headquarters rather than local FP&F processing. The Blue Water Bridge connects Port Huron, Michigan to Sarnia, Ontario and handles significant commercial and passenger traffic on I-94/I-69. Large-scale seizures at Port Huron are less common than at the Ambassador Bridge but generate substantial amounts when they occur.
Detroit’s Annual Seizure Totals — A Pattern of Sustained Enforcement
The Detroit Field Office has published annual seizure statistics that document a consistent multi-million dollar enforcement operation year after year. Documented annual totals include more than $5.2 million in fiscal year 2013, more than $7.8 million in fiscal year 2019, and consistent multi-million dollar totals in subsequent years. A 24% year-over-year increase in seizure value documented in 2013 reflected an enforcement surge that has largely been sustained since. Detroit CBP’s own statement at the time — that they publicize seizure statistics to deter future violations — reflects an enforcement culture that views transparency as part of the deterrence mission.
For travelers crossing at Detroit area ports, the practical implication is clear: the Detroit Field Office is one of the most active, most transparent, and most consistently enforced currency enforcement operations in the country. Filing an accurate FinCEN 105 is not optional — it is the only reliable way to avoid a seizure at this port.
What to Do If CBP Seized Your Cash in Detroit
Detroit is our home port. Great Lakes Customs Law has represented clients in dozens of Detroit Field Office currency seizure cases — at Detroit Metro Airport, the Ambassador Bridge, the Detroit-Windsor Tunnel, and the Blue Water Bridge. We have deep familiarity with the local FP&F office and the enforcement patterns at every crossing in the field office. Read our customs money seizure legal guide or watch the video series. See our currency seizure case outcomes. Call us at (734) 855-4999, send a text message, or reach us on WhatsApp. You can also contact us online for a free consultation.