Mexico's MVE Becomes Mandatory by Customs Regime (Nov 2026 – Jan 2027): What Importers Must Know

What Is the MVE and Why Does It Matter?

The Manifestación de Valor Electrónica (MVE) — also known as the E2 form — is Mexico's mandatory electronic declaration of the transaction value for imported goods. Once the MVE is mandatory for their customs regime (from November 1, 2026; definitive imports from January 15, 2027), every importer bringing goods into Mexico must file this document digitally through VUCEM, the government's single-window foreign trade platform. The requirement replaces older paper-based value declarations and aims to improve customs transparency, reduce fraud, and align Mexico with international valuation standards.

Key Deadlines and Legal Basis

• October 31, 2026: the MVE transition period ends (after several extensions since December 2025).
• November 1, 2026 – January 15, 2027: the MVE becomes mandatory by customs regime; definitive imports on January 15, 2027.
• Legal basis: Rule 1.5.1 of the RGCE 2025, Format E2, Annex 1.
• The importer — not the customs broker — must sign the MVE using their e.firma (FIEL).
• VUCEM assigns a unique MNVA number that the customs broker must reference in the pedimento.

How to File: The VUCEM SOAP Workflow

Filing the MVE involves a two-step SOAP web service call to VUCEM: first, the Ingreso (submission) service sends the signed XML; then, the Consulta (query) service retrieves the MNVA number asynchronously. The XML must be signed with RSA-SHA256 using the importer's FIEL certificate — customs broker digital seals will not work for MVE submissions. Companies importing regularly should automate this workflow via API integration to avoid manual delays.

Once the MVE becomes mandatory for your customs regime (definitive imports: January 15, 2027), non-compliance may result in shipment delays, penalties, and potential audits by Mexican tax authorities (SAT). Given the complexity of the VUCEM web services and the requirement for the importer's own digital signature, many companies are turning to specialized platforms to handle MVE submissions automatically, reducing the risk of errors and missed deadlines.