Mexico Tightens Customs Grip on Asian Imports

Mexico’s National Customs Agency, ANAM, will check Asian cargo before it reaches the border, comparing declared prices and origins with information already in its files. Importers can expect more questions, and shipments flagged for review may face delays. The agency is extending its checks upstream, before goods arrive.

Customs Knows Before Cargo Arrives

ANAM announced the tighter checks Wednesday, November 4, 2026. Estefanía Capdevielle, ANAM’s director general of customs attention and international affairs, said Mexico now exchanges information with Asian countries before goods arrive. “When merchandise goes to clearance, it already arrives flagged; we already know what it brings, we already know where it comes from,” she said.

The checks target undervaluation, which happens when an importer declares a price below the real one to pay less duty, and false country-of-origin declarations, which label goods as made somewhere with lower duties. Customs staff check shipment values and whether a claimed factory location seems plausible. They use Google Maps to compare a supplier’s location with its stated production.

Importers must file an electronic value declaration meant to make goods traceable from the original supplier to the final buyer in Mexico. Customs brokers also conduct additional due diligence for clients. Adriana Huerta, an executive vice president of CAAAREM, the confederation of Mexican customs-broker associations, described that work. Brokers are licensed agents who file import paperwork for companies; now, customs staff and the agents handling that paperwork both scrutinize companies.

Tariffs, Trade Rules and Who Decides

Mexico raised tariffs on January 1, 2026, setting rates from 5% to 50% on 1,463 product lines from countries without a trade deal, including China. The checks aim to ensure goods are declared honestly and importers don’t avoid those duties. A decree published in the Diario Oficial de la Federación in December 2025 imposed the tariffs. The decision came through official channels, leaving importers to document shipments and absorb any delays when customs flags cargo.

The U.S. wants stronger rules of origin as it reviews the USMCA, the trade pact between the United States, Mexico and Canada. Those rules determine how much of a product must be made in North America to enter duty-free. The U.S. wants to stop Chinese goods from entering North America through Mexico under a false label.

The U.S. Trade Representative, described as the White House trade office, and Mexico’s economy secretary Marcelo Ebrard launched the review process in March 2026. Their official statements list stronger rules of origin for key industrial goods among the topics. The source reports no grassroots organizing, mutual-aid effort, or community response to the new checks; it describes institutional enforcement and customs-broker due diligence instead.

The Numbers Still Under Wraps

ANAM hasn’t published how many shipments it has flagged or how much revenue the checks have recovered. It also hasn’t identified which products or Asian countries will face examination first. Whether Washington will consider the enforcement sufficient in the USMCA talks remains unclear. People and firms subject to checks are told to prepare, but the agency hasn’t disclosed the operation’s scale or initial targets.

Importers whose goods pass through Mexico should expect more questions about prices and factory addresses, keep invoices and origin documents ready, and prepare for possible border delays if customs flags a shipment. The report says the checks should help Mexican manufacturers that follow the rules by limiting competition from cheap, undervalued imports.

Manzanillo bay in Colima, the site of the Pacific port of Manzanillo, is identified as a gateway for cargo from Asia. Separately, Polymarket, a real-money, crypto-based prediction exchange, priced the chance of a 2026 USMCA extension at about 8% on Wednesday evening, November 4, at 5:18 p.m. ET, with about US$11,800 traded. The report calls it a thin signal. That market’s number doesn’t settle the question; the people making trade rules still do.