Shipping Instructions

Shipping instructions (often shortened to SI) are the definitive data package a shipper or forwarder sends to the carrier after booking confirmation. They translate the commercial deal into precise transport instructions that drive the bill of lading, manifests, and downstream compliance.

For export moves, shipping instructions connect sales terms, cargo details, and routing preferences into a carrier-ready format. Errors here ripple into documentation, customs filings, and ultimately freight release.

What are Shipping Instructions?

Shipping instructions are a structured set of fields submitted to the ocean carrier (or NVOCC) that tells them how to issue the bill of lading and how to handle the shipment operationally. They include parties, cargo description, weights and measures, routing, service level, and document requirements.

In practice, SI data is usually submitted electronically through a carrier portal or via EDI. The timing is critical: it follows booking confirmation but must arrive before the carrier’s SI cut-off to avoid rollovers or late documentation fees.

Why Shipping Instructions Matter

Accurate SI protects revenue, reduces delays, and keeps compliance clean. Because the bill of lading is a legal transport document, any mismatch between commercial documents and shipping instructions can create cargo holds, amendments, or disputes about liability.

For exporters, SI data feeds AES/ACE filings, certificates, and country-specific export documentation. For importers, it determines how cargo is described and who can claim it at destination.

For Freight Forwarders

Forwarders often consolidate shipments and submit SI on behalf of multiple shippers. That makes data quality and cut-off management crucial. A missing party or wrong incoterm can cascade into multiple bookings.

For Carriers

Carriers rely on SI to generate the bill of lading, manifest data, and security filings. When SI arrives late or inconsistent, they must issue amendments or hold documentation, which adds cost and risk.

How Shipping Instructions Work

The process starts with a booking confirmation. Once space is secured, the shipper or forwarder submits shipping instructions, usually 24–72 hours before the vessel’s documentation cut-off. The carrier validates the data and issues the bill of lading draft for approval.

If the draft is accepted, the carrier releases the final bill of lading and transmits manifest data. Any corrections after that point may require amendments and fees.

Booking confirmation issued → SI submitted → carrier validates → bill of lading draft
Draft approved → final B/L issued → manifest transmitted
Late changes → amendment process and potential charges

Key Fields in Export Shipping Instructions

Export shipping instructions are comprehensive. They typically include shipper, consignee, and notify party; cargo description and HS codes; weights and dimensions; container numbers; service terms; and document preferences.

Shipper, consignee, notify party, and forwarder details
Cargo description, HS code, marks & numbers
Gross weight, volume, package count
Routing: POL, POD, final destination
Incoterms and freight payment terms
Special instructions (reefer set points, hazardous declarations)

Common SI Errors and Their Impact

Most SI issues are data mismatches or timing problems. A wrong consignee name can delay document release; incorrect weights can trigger customs holds; a missing party can invalidate the bill of lading.

Inconsistent cargo description vs commercial invoice
Incorrect payment terms (collect vs prepaid)
Missing export references (AES/ITN numbers)
Late submission past SI cut-off

Best Practices

Confirm booking details before preparing SI to avoid mismatches.
Use standardized templates and validated master data for parties.
Submit SI early and confirm carrier receipt before cut-off.
Review the bill of lading draft line-by-line against commercial docs.
Track cut-offs and changes centrally (Terminal49 can help monitor milestones).

Example: SI Timeline for an Export Booking

A US exporter books a 40’ container to Rotterdam. After booking confirmation, the forwarder submits shipping instructions with the consignee, cargo details, and AES ITN. The carrier validates SI and issues a draft B/L two days before documentation cut-off. The shipper approves, and the final bill of lading is released before vessel departure.

SI, Compliance, and Data Visibility

Because SI drives customs filings and manifests, data visibility matters. Platforms like Terminal49 help teams align SI data with booking and container milestones so late changes don’t create exceptions.

Bill of Lading (B/L) - transport document issued from SI data
Booking Confirmation - carrier acceptance of space before SI
AES/ACE Filing - export data filed from SI details
Incoterms - define responsibilities referenced in SI
Manifest - carrier’s official cargo list derived from SI