Quick Answer: Mexico's electronic Manifestación de Valor (Formato E2) is now mandatory via VUCEM. The importer of record keeps the legal liability — even when a customs agent or fulfillment partner files it for them.

As of June 1, 2026, Mexico requires the electronic Manifestación de Valor (Formato E2) to be transmitted and e-signed through VUCEM (the Single Window for Foreign Trade); it generates an e-document that is declared on the pedimento (import declaration). Filing it needs an e.firma, an RFC, and a VUCEM account, plus a complete value file (Expediente del Valor) — commercial invoice, transport and payment documents, and any adjustments to the price. The legal responsibility sits with the importer of record, and that liability does not transfer even when a customs agent or partner does the technical transmission. It must be submitted before duties are paid, and every field has to match the invoice, COVE, and pedimento. For most cross-border sellers, the practical answer is not to learn VUCEM themselves — it is to have a customs broker or duty-inclusive fulfillment partner file it correctly on every shipment, and to verify that they do.

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What Filing the Formato E2 Actually Involves

This is a practical walkthrough of the electronic MVE filing — what it is, who is on the hook, and how to make sure it is done right. For the deadline and penalty background, see our Mexico MVE deadline guide and the Mexico SAT VUCEM compliance guide.

The Manifestación de Valor is a declaration of the customs value of imported goods. The Formato E2 is the electronic version, e-signed and transmitted through VUCEM — it replaced the prior paper-based manifestación, which was kept in the importer's file. The system produces an e-document that is then referenced on the pedimento, linking your declared value directly to the import.

It became available for voluntary use on August 1, 2025, ran a dual-scheme transition through May 31, 2026, and is mandatory from June 1, 2026.

The Formato E2 is more than a price box. Its main sections:

Here is the part sellers miss: legal responsibility falls on the importer of record, and delegating the work does not transfer it. A customs agent (agencia aduanal) or fulfillment partner can do the technical transmission and even hold the access, but if the declared value is wrong, the importer owns the consequence. (Companies certified as OEA, and certain fiscal-deposit regimes, have specific exemptions.)

So the real question is not "can someone else file it" — yes, they can — but "is the party filing it doing it accurately and consistently, every time."

The manifestación has to be transmitted before the duties (contribuciones) are paid — in practice, before customs clearance (despacho), with the e-document declared on the pedimento. For consolidated pedimentos, it is transmitted at clearance closure. The takeaway: value has to be settled at the start of the operation, not patched afterward — late or inconsistent filings mean clearance friction and pedimento rectifications.

1. Treating documents in isolation — the invoice, COVE, MVE, and pedimento must tell one consistent story; mismatches get flagged in automated review.
2. Missing value elements — forgetting additions beyond the invoice price (services, commissions, importer-assumed costs).
3. Assuming documents are "only if requested" — the value file should exist per operation, ready to show.
4. Delegating with zero oversight — handing it entirely to an agent without checking the declared values.
5. Data inconsistencies — currency, sales conditions, or omitted adjustments that do not reconcile with the invoice.

For a cross-border seller, learning VUCEM, maintaining an e.firma, and reconciling value files per shipment is rarely the best use of time — and the consistency requirements (invoice/COVE/MVE/pedimento all matching) are exactly where DIY filings break. The cleaner path for most sellers is to have a customs broker or duty-inclusive fulfillment partner file the Formato E2 on every shipment, while you keep two simple controls: supply truthful values and product descriptions, and confirm in writing that the electronic MVE is being transmitted on each order.

With a duty-inclusive model, the customs side — the electronic MVE, value declaration, classification, and duty payment — is handled as part of fulfillment, so the buyer sees one price at checkout and no surprise fees at delivery.

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Do I have to file the Formato E2 myself?

No. A customs agent or fulfillment partner can transmit it on your behalf. But the legal responsibility for the declared value stays with the importer of record — delegation does not transfer liability — so you should confirm it is filed accurately on every shipment.

What do I need to file the electronic MVE?

An e.firma (valid electronic signature), an RFC and VUCEM account, and a complete value file: commercial invoice, transport and payment documents, contracts, and any elements that adjust the price. The declared data must match the invoice, COVE, and pedimento.

When must the Formato E2 be submitted?

Before the duties are paid — in practice, before customs clearance, with the resulting e-document declared on the pedimento. For consolidated pedimentos, at clearance closure. Plan the value at the start of the operation, not after.

What happens if the MVE is wrong or missing?

Omissions and inconsistencies are flagged in automated reviews and audits, and carry tiered penalties under Article 185 of the Customs Law (roughly MXN 15,000–50,000 per operation for omission, up to MXN 90,820–121,100 or 70–100% of the value difference for undervaluation). Practically, it also stalls clearance.

Is Formato E2 the same as the old paper manifestación?

No — and this trips people up. Formato E2 is the new electronic manifestación filed through VUCEM. It replaced the prior paper-based process; the paper scheme was never called "E2." E2 is the format you now have to use, not the one you are leaving behind.

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Shipping to Mexico and want the customs filing handled correctly every time? Just DS provides duty-inclusive Mexico fulfillment — we handle the electronic MVE, value declaration, classification, and duty payment so your declared data is consistent and on-time, and your customers pay one price with no surprise fees at delivery. Zero MOQ. Get a Mexico shipping quote on WhatsApp.

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Last updated: June 1, 2026 — the day the electronic MVE (Formato E2) became mandatory. For the deadline timeline and penalty schedule, see the Mexico MVE deadline guide.

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