Mexico Export Documentation Guide

Exporting to Mexico from the USA means meeting US filing rules and Mexican customs requirements. This Mexico export documentation guide explains what applies and how LAC™ helps coordinate the process.

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AES Filing Requirements

Electronic Export Information (EEI) must be filed through the Automated Export System (AES) whenever a shipment’s value exceeds $2,500 per Schedule B number, per 15 CFR § 30.37 of the US Census Bureau’s Foreign Trade Regulations. Filing is also required when an export license applies, regardless of value. Understanding these AES filing requirements early keeps your shipment compliant.

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Who Must File the EEI

The US Principal Party in Interest (USPPI) is responsible for the Electronic Export Information, though an authorized agent may file on the exporter’s behalf. The filer must be located in the United States and hold an Employer Identification Number (EIN). As a freight forwarder, LAC™ coordinates these export filings alongside our ground freight services, aligning the responsible party and agent to keep submissions accurate.

Mexican Customs Documentation on Arrival

On the Mexican side, clearance depends on a Pedimento de Importación, a Spanish-language commercial invoice, and a detailed packing list. These documents must match one another precisely, because discrepancies can stall release at the port of entry. With 25+ years of experience coordinating cross-border documentation, LAC™ helps exporters prepare each piece correctly.

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AES Filing Deadlines and Penalties

For most non-ITAR (International Traffic in Arms Regulations) shipments, you must transmit Electronic Export Information no later than two hours before export, per 15 CFR § 30.4 of the US Census Bureau’s Foreign Trade Regulations. Missing that two-hour filing window, or omitting a required filing entirely, can trigger civil penalties under US export law. Building the filing into your timeline, rather than treating it as an afterthought, protects both your schedule and your compliance record.

How Documentation Moves Forward

Mexico export documentation moves through clear stages: pre-pickup preparation, where paperwork is gathered and checked; border transfer, where documents travel with the shipment to the assigned carrier; and customs review, where Mexican authorities verify cargo against its declarations at the port of entry before release. Each stage depends on the accuracy of the one before it.

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Most customs holds trace back to avoidable errors:

A missing or incorrect Schedule B number, or incomplete Schedule B classification
A vague product description that leaves officials unable to verify the commodity
Incomplete Pedimento data, which creates the same problem on the Mexican side

Precise descriptions and correct classification reduce the risk of delays and keep shipments moving through clearance.

LAC’s Role in Documentation Support

LAC™ helps exporters manage Mexico export documentation across both sides of the border. Our bicultural, LATAM-focused team pairs 25+ years of experience with a working knowledge of US filing requirements and Mexican customs practices. LAC works with a network of carriers that hold memberships and certifications with trucking organizations such as the American Trucking Associations (ATA) and CANACAR in Mexico, and that follow Commercial Vehicle Safety Alliance (CVSA) inspection standards on both sides of the border. That network includes CTPAT-certified carriers, which typically benefit from faster, more predictable border processing.

Frequently Asked Questions

Does AES filing apply to every shipment to Mexico?

No. Not every shipment requires AES filing. The requirement depends on the shipment’s value per Schedule B number and whether an export license applies to the goods. A shipment valued below the $2,500 threshold for a given commodity may not need a filing, while a licensable item does regardless of value. Because these conditions vary, check the requirement shipment by shipment.

What replaced the paper Shipper’s Export Declaration?

Electronic filing through the Automated Export System replaced the older paper Shipper’s Export Declaration process. Exporters no longer submit a physical form. Instead, they transmit Electronic Export Information data electronically through AES. This shift standardized how export details are reported and made the information easier to process, giving exporters a single electronic channel for meeting their reporting obligations on qualifying shipments.

Where do I find my product’s Schedule B number?

The Schedule B number comes from the US Census Bureau’s classification tool, which you consult before export. This number identifies your commodity and, in turn, helps determine whether AES filing is required for that shipment. Because classification drives both reporting and value thresholds, taking the time to find the correct Schedule B number early prevents downstream errors that can surface during customs review.

Who prepares the Pedimento de Importación?

A licensed Mexican customs broker prepares and files the Pedimento de Importación. This document is the core declaration form required to clear commercial shipments into Mexico, and Mexican law reserves filing it for licensed brokers. The broker uses the commercial invoice, packing list, and supporting paperwork to complete the declaration accurately, so exporters should provide complete, consistent documents.

Can a freight forwarder handle both US and Mexican export paperwork?

Yes. A freight forwarder can coordinate both sides of the paperwork when exporting to Mexico from the USA. In practice, it works alongside the exporter’s AES filer in the United States and a licensed customs broker in Mexico, keeping the documentation aligned between the two. This coordination reduces mismatches, closes gaps between US filing and Mexican clearance, and helps shipments move through each stage without avoidable holds.