One kind of client worries me most: entries have always cleared, never been examined, therefore “our filings are fine.” Clearing only means not yet selected. US customs is architected so that filing accuracy was never customs’ responsibility — it is the importer’s, by statute, and the obligation has a name: reasonable care.
Written by SKYCARGO INC, a US logistics company shipping between the US and Taiwan since 2014 and incorporated in the US in 2023, with warehouses in Oregon, Los Angeles and Taoyuan; it serves as an FDA U.S. Agent and can assist clients with USDA registrations and inquiries. More on this topic: US Customs & Tariffs: The Complete Guide Index.
Informed compliance: the rules are published; getting them right is on you
Since the 1993 Customs Modernization Act, US customs runs on informed compliance: CBP owes the public clear rules (Informed Compliance Publications, rulings, guidance), and importers owe reasonable care that their declarations are correct. In plain words: everything is published, so “I didn’t know” is not a defense.
Whose duty is it? The party named Importer of Record. Hiring a broker does not transfer it — the broker is your agent, and final responsibility for the filing stays with the IOR.
The five territories of the duty
Reasonable care is not abstract; CBP’s guidance lands it on concrete questions:
- Classification: is there a basis for each HTS code? Binding Rulings requested where uncertain?
- Valuation: is dutiable value right — assists, royalties, the statutory additions all in?
- Origin: does the declared origin survive tracing — transshipment and substantial transformation supported?
- Marking: is the physical origin marking compliant?
- Permits and partner agencies: FDA, USDA, FCC — registrations and licenses current?
Penalty tiers: the same error, an order of magnitude apart
When CBP pursues a filing error, penalties scale by conduct: negligence, gross negligence, fraud — and for the same underpaid duty, the tier can move the penalty by more than an order of magnitude. The pivot is precisely whether you exercised reasonable care:
- Audit process in place, records kept, the error an isolated slip → a case for the lightest tier, even mitigation
- No process at all, the error systemic and long-lived → the heavy tiers
- The self-audit record is itself the evidence — proof you were exercising the duty, and impossible to reconstruct after the fact
One more mechanism worth knowing: Prior Disclosure — voluntarily correcting and paying before customs opens a case cuts penalty exposure dramatically.
The 10-question annual self-audit
Run these once a year, each with a record of who checked, what, and the conclusion:
- Does every HTS code used in the past year have a written classification basis?
- Is there a classification-review step when new products launch?
- Any statutory additions missed in valuation — assists (molds, designs), royalties?
- Are related-party prices supported by transfer-pricing documentation?
- Could every supplier’s origin declaration be evidenced today?
- Do product and carton origin markings meet the marking rules?
- Are FDA/USDA registrations and permits for regulated items current?
- Are entry documents, invoices and packing lists retained for the statutory period?
- Were last year’s CBP CF28 inquiries and CF29 notices answered and filed?
- Are the broker’s filings spot-checked against your records — or running unwatched?
Whatever you cannot answer is this year’s gap list.
Where SKYCARGO fits
This checklist is also the standard SKYCARGO INC uses when helping clients self-audit: classifications with bases, valuations with add-back lists, documents retained. The Importer of Record is normally the client, and we help bring the filing paperwork to an audit-ready state. We act as Importer of Record for a client’s goods in one situation only: when we are your selling agent in the US — under a long-term agency agreement, actually finding buyers and taking orders for you in the US, paid a commission on sales, with warehousing, delivery and customer service continuing after import, and, for food, running the FSVP ourselves. We take these cases only when all of those conditions are met. We do not act as a nominal consignee, collect and forward payments only, or sign a power of attorney only. Penalty assessment and disclosure strategy after an audit finding are legal work — consult compliance counsel or customs attorneys. B2B shipments, talk to us. (Personal parcels: Shiptw.)
Reasonable care requirements follow current CBP law and guidance. Reference only; consult compliance counsel for specific cases.
