Common Causes of Border Delays for Freight

Border delays usually begin with a mismatch between the shipment, its customs filing, and the documents available when the freight reaches the port of entry. Common trouble points include a release request that is missing or rejected, an incomplete commercial invoice, an incorrect product classification or value, missing permits, an unsupported origin claim, or freight selected for examination. Traffic, weather, equipment problems, and poor coordination can add time too, but clean customs data is the part a shipper can improve before pickup.

The exact requirements depend on the direction of travel, commodity, importer of record, border crossing, and government agencies involved. This guide focuses on commercial truck freight moving between the United States, Canada, and Mexico. It was checked against the official sources listed below on July 21, 2026 and is practical preparation guidance, not customs, tax, or legal advice.

The main causes at a glance

Delay point	What can go wrong	What to confirm before pickup
Release filing	The filing is not on file, is rejected, does not match the cargo record, or reaches customs too late	Broker, filing system, port of entry, cargo-control reference, and submission status
Commercial invoice	Product description, parties, quantity, value, or origin is incomplete or inconsistent	Final invoice data matches the physical goods and transaction
Classification and admissibility	The tariff code is wrong or the commodity requires another agency’s permit, certificate, licence, or review	Current classification and every commodity-specific approval
Preferential-origin claim	The shipper assumes USMCA treatment without the required supporting data	Eligibility, certifier, nine required data elements, and records
Examination or referral	Customs refers the shipment for document review or physical examination	Time allowance, broker availability, and a reachable decision-maker
Mexico transport document	The required CFDI and Carta Porte information is missing or does not describe the movement correctly	Current SAT requirements and the party responsible for issuing the document
Physical movement	Congestion, weather, loading delays, breakdowns, or a missed handoff interrupt the move	Pickup readiness, route, equipment, contacts, and appointment constraints

Not every delay can be prevented. A shipment with accurate documents can still be examined or affected by conditions at the crossing. The goal is to remove avoidable inconsistencies and give the carrier, customs broker, importer, and consignee the same usable information.

1. The release request is missing, late, rejected, or mismatched

Customs release is a separate workstream from moving the truck. The carrier reports the cargo, while the importer or customs broker generally handles the release filing. Those records must refer to the same shipment and destination.

For Canadian imports, the Canada Border Services Agency says commercial goods are not eligible for release until they have been reported, have arrived at the destination release office, and the required release or accounting documentation is in order. Its current release memorandum also says goods can be held when a release request is not on file, and a rejected request must be corrected before release can occur. A mismatch between the sub-location on the release request and the cargo-control documents can also interrupt the handoff.

The practical fix is to establish ownership before the freight moves. Confirm who is the importer of record, which broker will file, which port and release office will be used, which cargo-control or shipment reference connects the filing to the carrier record, and whether the filing has been accepted rather than merely sent.

2. The commercial invoice does not describe the transaction accurately

The commercial invoice is customs evidence, not a generic packing note. For a U.S. import, CBP expects the invoice and entry documents to support the product description, classification, value, and other information needed to determine admissibility and duty. CBP’s current valuation guidance says the declared value generally begins with the price paid for the goods and may require specified additions such as packing, assists, royalties, selling commissions, or proceeds, depending on the transaction.

For a Canadian import, CBSA’s release requirements call for commercial-invoice information including the vendor and consignee, a description detailed enough to classify, value, and inspect the goods, the required HS classification, and country of origin. Permits, licences, certificates, and other participating-government-agency documents must accompany the release information when required.

Compare the final invoice with the physical load before pickup. The commodity description, package count, weights, quantities, model or part details, currency, transaction value, seller, buyer, consignee, and country of origin should not conflict with the packing list, bill of lading, purchase record, or broker instructions.

3. Classification, value, origin, or permits are not settled

Customs authorities need to know what the goods are, what they are worth, where they originate, and whether another agency controls their import. A vague label such as “parts,” “equipment,” or “samples” may not provide enough detail to classify or inspect the product. A freight class or NMFC item number does not answer the customs question; those are LTL transportation references, not tariff classifications. The HS Code vs NMFC Code guide explains the distinction.

Do not wait until the truck is at the border to discover that the commodity needs a permit or a different agency’s review. CBP’s formal-entry guidance directs importers to check for product-specific requirements involving agencies such as FDA, EPA, or DOT and to submit required special documents with the entry package. The responsible importer and broker should confirm the current rule for the actual product and direction of trade.

Uncertainty should be resolved before tender. Give the broker a precise product description, material or composition, principal use, model or part information, country of origin, value basis, and any prior ruling or permit reference. Avoid copying a tariff code or value from an old shipment unless the underlying facts still match.

4. A USMCA preference claim lacks support

USMCA does not make every shipment between the United States, Canada, and Mexico duty-free. The goods must satisfy the applicable rule of origin, and a preferential claim needs supporting information.

The International Trade Administration explains that USMCA no longer requires one prescribed certificate form. Instead, the certification may appear on an invoice or another qualifying document and must contain nine minimum data elements, including the certifier, parties, product description, six-digit HS classification, origin criterion, blanket period when applicable, and authorized signature and date. The importer remains responsible for exercising reasonable care with the documentation.

Treat the origin claim as a compliance decision, not a box to check automatically. Confirm who will certify, why the product qualifies, which records support that conclusion, and whether the importer and broker have the certification before the claim is made. If preference is not being claimed, make that clear so the commercial and customs records do not contradict one another.

5. Customs refers the freight for review or examination

An examination is not proof that the shipper made an error. Customs can refer freight even when the filing is complete. It can still add time because the goods may need document review, movement to an examination site, opening, inspection, or coordination with another agency before release.

CBP’s formal-entry guidance notes that shipments requiring examination may have to move under bond to an examination site before release and that the importer can incur a related charge. CBSA’s release process similarly produces either a release or refer decision. No document checklist can guarantee that customs will select release.

Build this uncertainty into the plan. Avoid a delivery promise that leaves no room for border processing, keep the broker and importer reachable, and decide who can answer a customs question about the product or transaction. If the shipment is time-sensitive, ask the carrier and broker what cutoff, arrival, and appointment assumptions they are using rather than treating an estimated transit time as a guarantee.

6. Mexico’s Carta Porte information is missing or inconsistent

Freight moving within Mexico can involve an additional transport-document requirement. Mexico’s tax authority, SAT, states that the CFDI with Complemento Carta Porte records the goods, origin, intermediate points, destination, and transport mode. SAT says version 3.1 is the valid complement used with CFDI 4.0 and that the requirement applies to taxpayers transporting goods in Mexican territory; it also identifies a specific application to foreign-trade operations.

That does not mean the U.S. shipper should issue or complete the document without checking the transaction. Confirm with the Mexican carrier, importer, and qualified customs or tax professional which party must issue the CFDI, which Carta Porte data is required, and how the commercial invoice, customs entry, carrier record, and Mexican inland movement should align. Use current SAT instructions for the actual transport mode.

7. The physical move and the information handoff break down

Customs preparation does not prevent traffic, severe weather, equipment trouble, congestion, or a late pickup. It can, however, prevent an ordinary operating problem from becoming a documentation problem.

Give every responsible party the same shipment identity and escalation contacts. The carrier should know the correct pickup and delivery locations, border crossing when established, package count, dimensions, weight, commodity description, appointment requirements, and handling needs. The broker and importer should be able to match that freight to the invoice, packing information, cargo record, and release filing. The consignee should know who will answer a customs question and who can accept delivery after release.

A pre-pickup border-readiness check

Use this sequence before the carrier arrives:

1. Name the responsible parties. Record the importer of record, exporter, customs broker, carrier, consignee, and the person authorized to answer product or transaction questions.
2. Confirm the lane. Verify origin, destination, intended port of entry or crossing, pickup date, and delivery or appointment constraints.
3. Describe the freight once. Reconcile the product description, package count, dimensions, weight, quantity, and marks across the invoice, packing information, and transportation record.
4. Confirm customs data. Verify the current tariff classification, country of origin, valuation basis, currency, and any USMCA claim with the responsible compliance party.
5. Collect product approvals. Identify permits, licences, certificates, or agency filings required for the commodity and direction of trade.
6. Check the release workflow. Confirm which reference links the carrier’s cargo record to the broker’s release request and verify that the filing is accepted or ready for submission under the chosen process.
7. For Mexico, confirm Carta Porte responsibility. Use the current SAT rules and carrier or broker instructions for the Mexican leg.
8. Plan for exceptions. Keep the broker, importer, shipper, and consignee reachable and leave realistic room for a customs referral or physical disruption.

Shipocity is backed by a team with more than 40 years of combined logistics experience. Through established industry relationships, the platform helps businesses compare competitive freight rates for their specific shipment.

When the shipment details and customs responsibilities are confirmed, start a cross-border freight quote to compare available options for the lane, create an account, and continue toward booking.

Sources

• U.S. Customs and Border Protection - Filing a Formal Entry
• U.S. Customs and Border Protection - Commercial Invoice Value
• Canada Border Services Agency - Release of Commercial Goods
• International Trade Administration - USMCA Certification of Origin
• Mexico Tax Administration Service - Complemento Carta Porte