The Cost of Getting It Wrong at the Border
For most importers, the real education in customs law happens the hard way. A shipment gets held at the port. A classification dispute triggers an audit that reaches back three years of entries. A penalty notice arrives with a number attached that threatens to wipe out the margin on an entire product line.
By the time those moments happen, the damage is already accumulating. The bills from detention. The operational disruption of delayed inventory. The cost of reactive legal work that would have been a fraction of the price if the problem had been caught — or prevented entirely — before the goods ever left the foreign port.
This is the central argument for working with a customs attorney proactively, not just when something goes wrong. The complexity of US customs law, the number of ways an importer can inadvertently create liability, and the asymmetry between the cost of prevention and the cost of enforcement action make legal guidance one of the most financially rational investments in a supply chain.
What a Customs Attorney Actually Does
The popular image of an attorney as someone you call when you’re in trouble is only half the picture in customs law. Yes, a customs attorney represents importers in enforcement actions, penalty proceedings, and litigation before the Court of International Trade. But the work that delivers the most consistent value is the preventive kind — and it happens long before any dispute arises.
Pre-importation planning is the foundation. Before goods enter the United States, there are decisions to be made about tariff classification, valuation methodology, country of origin determination, and free trade agreement eligibility. Each of these decisions has a direct financial consequence — affecting the duty rate applied to every entry — and each of them is subject to challenge by US Customs and Border Protection if the determination doesn’t hold up to scrutiny.
A skilled customs attorney helps importers make these decisions correctly upfront, and — critically — obtain binding pre-importation rulings from Customs that lock in that determination before the goods arrive. A binding ruling isn’t just good planning. It’s legal certainty. It means the importer can accurately model their landed cost, make competitive pricing decisions with confidence, and face any subsequent Customs review knowing the classification has already been verified by the agency itself.
The Tariff Classification Problem Is Bigger Than Most Importers Realize
Tariff classification is the process of assigning the correct Harmonized Tariff Schedule (HTS) code to imported merchandise. That code determines the duty rate. For most products, the classification looks simple on the surface — there’s a description that seems to match, and an importer assigns it and moves on.
The problem is that the HTS is a 99-chapter document with thousands of subheadings, each governed by legal notes, classification principles, and decades of ruling precedents that aren’t always intuitive. Two products that look similar can have dramatically different classifications — and dramatically different duty rates — based on distinctions that require real legal expertise to navigate correctly.
Misclassification is common. And the financial exposure isn’t limited to future entries — Customs can pursue back duties on prior entries, turning a classification error into a liability that stretches back years.
A tariff attorney who understands the HTS, the General Rules of Interpretation, and the administrative ruling history can identify classification risk before it becomes a liability, challenge incorrect classifications that are costing an importer more than they should, and build the legal record needed to defend a classification position if Customs decides to push back.
Seizures, Detentions, and What Happens When Customs Acts First
Not all customs disputes begin with a quiet audit. Sometimes Customs acts first — detaining merchandise at the border, seizing goods outright, or issuing a penalty notice that demands a response within a tight deadline.
Each of these situations has its own legal process, its own remedies, and its own deadlines that, if missed, can eliminate options that would otherwise be available. A seizure can be challenged through a petition process. A penalty can often be mitigated if the importer responds appropriately and demonstrates good faith. A detention can sometimes be resolved quickly with the right documentation and legal argument.
The window for taking effective action is often short. And the quality of the response — the strength of the legal argument, the appropriateness of the documentation, the tone and framing of the petition — matters enormously.
This is not the moment to figure out what the process is. It’s the moment to have already established a relationship with a customs attorney who knows the process, knows the agency, and knows how to position an importer’s response for the best possible outcome.
Free Trade Agreements: Where the Stakes Are High and the Rules Are Unforgiving
Free trade agreements represent some of the most significant duty reduction opportunities available to US importers. The US has FTAs in effect with over twenty countries, and properly structured transactions can qualify goods for reduced or zero duty rates that dramatically improve economics for importers sourcing from those regions.
The operative word is “properly structured.” FTA qualification is not automatic. Rules of origin determine whether goods actually qualify, and those rules vary by agreement and by product category. Minor errors in documentation, incorrect certificates of origin, or supply chain structures that don’t meet the applicable origin requirements can disqualify goods from preferential treatment — and expose an importer to back duties if Customs determines that preferential treatment was claimed incorrectly.
A customs attorney with FTA expertise helps importers determine qualification eligibility accurately, structure supply chains to maximize FTA benefits, and maintain the documentation required to defend preferential duty claims under Customs review.
The Section 301 and Tariff Landscape: Why a Tariff Lawyer Matters Now
The current US tariff environment is more complex and more consequential than it has been in decades. Section 301 tariffs on goods of Chinese origin, Section 232 tariffs on steel and aluminum, and a range of additional trade measures have created a layered tariff structure that affects importers across virtually every product category.
In this environment, working with a tariff lawyer isn’t a specialized need limited to large multinational importers. It’s a practical necessity for any business that sources goods internationally and wants to ensure they’re paying the correct duties — not more than required, not less than owed, and with the legal documentation to defend every position they take.
The interaction between normal column 1 duty rates, FTA preferential rates, and Section 301 additional duties requires careful analysis to navigate correctly. Classification decisions that were settled before the 301 tariffs took effect may now warrant reconsideration. And exclusion opportunities — where they still exist — require active monitoring and timely application.
Nine Decades of Customs Law Experience
Stein Shostak Shostak Pollack & O’Hara, LLP has been representing importers and exporters since 1933. That longevity isn’t just a number — it represents an institutional depth of experience that spans multiple generations of trade policy, tariff regimes, and customs enforcement priorities. The firm’s attorneys have earned the respect of US Customs officials and international trade community members, and peer law firms routinely refer complex customs matters to SSSPO precisely because of that depth.
The firm’s headquarters in Los Angeles and office in Shanghai position it well for clients sourcing from Asia — which, for many US importers, is exactly where the most complex and consequential customs issues arise.
Don’t Wait for a Problem to Find a Customs Attorney
The most expensive customs problems are the ones that were preventable. Classification errors that compound across years of entries. FTA claims that can’t be defended because the documentation wasn’t maintained. Penalty exposure that could have been avoided with proactive compliance work.
SSSPO’s approach starts with prevention — helping importers build the legal foundation for sound customs compliance before Customs has any reason to look twice.
Contact Stein Shostak Shostak Pollack & O’Hara, LLP at steinshostak.com or call the Los Angeles office at (213) 630-8888 to start the conversation about protecting your import program.
