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ARTICLE · 05 NOVEMBER 2026

When Mexican IMMEX Records Become A U.S. Importer’s Documentation Problem

U.S. companies sourcing from Mexican manufacturers under the IMMEX program face a critical challenge: ensuring that shop-floor production records align with customs filings.

MexicoInternational Law

By AMMEX Mexico Editorial Team

A U.S. company spends months qualifying a Mexican manufacturer. Pricing is locked in, the production trial goes smoothly and the supplier holds an active IMMEX authorization. By the time the purchasing team is ready to issue the first purchase order, someone finally asks a question that never came up during the plant tour: How will the supplier actually track the materials entering Mexico, and what happens when shop-floor production records don’t match the customs filings?

On paper, that sounds like the Mexican factory’s problem. Under Mexican law, much of it is. In practice, however, messy inventory records south of the border have a way of creating headaches for the U.S. importer of record.

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