US importers must recognize that customs clearance is not a final stamp of approval but a conditional release, according to compliance specialists. During a recent CargoTrans webinar, Rennie Alston, director of trade compliance, stressed that the Customs and Border Protection (CBP) agency can revisit entries throughout the 314-day liquidation period, and importers are obligated to retain supporting records for five years. This distinction is becoming critical as tariff volatility prompts companies to alter suppliers, sourcing routes, declared values, and countries of origin.
CBP is leveraging technology and artificial intelligence to detect patterns across an importer's history, rather than examining individual shipments in isolation, noted Nunzio De Filippis, co-CEO of CargoTrans. This allows the agency to identify abrupt changes at unprecedented speed. Alston warned that such changes could be interpreted as evidence of tariff circumvention unless importers can demonstrate reasonable cause. "Customs operates not in the belief of innocent until proven guilty," he cautioned, adding that the agency assumes guilt on the appearance of noncompliance until importers prove otherwise.
To mitigate risks, importers need full visibility of transactions before goods are shipped, including purchase orders, commercial invoices, quantities, origin, and classification. Relying solely on supplier documentation or a customs broker is insufficient. Companies should strengthen broker oversight and proactively examine their customs data. Alston also advised against complacency, stating, "Never say this is how we've always done it," as such an attitude could prompt CBP to broaden its review.
For those engaged in import and export, especially through major hubs like Shanghai port, these lessons are equally relevant. While the focus is on US customs, the principles of thorough documentation and proactive compliance apply globally. Working with a knowledgeable customs broker and ensuring accurate customs declarations can help avoid costly disputes. As China sourcing remains a key part of global supply chains, importers must ensure their customs documents reflect true transaction details to withstand scrutiny from any customs authority.