After thousands of client files, classification errors repeat in patterns. Check your own declarations against this list.
1. Copying the supplier's code
The exporter's national code is built for their tariff, their rules, their incentives. It is evidence of nothing in your country. Auditors love this one because the paper trail proves no independent analysis was done.
2. Classifying by product name, not by GIR
"Smart", "eco", "multi-function" — marketing vocabulary maps to nothing in the nomenclature. Classification follows objective characteristics: composition, function, working principle.
3. Ignoring Section and Chapter Notes
The Notes are law (GIR 1). Note 2 to Section XVI redirects parts; Note 1 exclusions silently move products between chapters. Most wrong codes die on a Note the classifier never read.
4. One product, many codes
The same input declared under different codes across shipments — sometimes by different brokers — is the single most common post-clearance audit finding in Vietnam and a negligence indicator in the US.
5. Optimizing for duty before analyzing
Choosing the lowest-duty candidate first and building justification backwards is visible to any experienced auditor. Do the GIR analysis first; if two codes genuinely survive, then duty may inform the defensible choice.
6. Forgetting the measures behind the code
The code decides more than duty: anti-dumping scope, license requirements, quarantine regimes, CBAM. A "cheap" code that walks into an AD order at 60%+ is not cheap.
7. No classification file
When customs asks "why this code?", the answer must exist on paper: description, GIR reasoning, sources, rulings. Our platform generates this file automatically for every search — keep it with the shipment records.
The fix
Centralize classification: one internal HS registry, one review workflow for new SKUs, legal justification attached to every code, and periodic re-validation when nomenclature versions change.