Exporting to the UK in 2026 - A Data and Document Checklist for Polish Companies Before Clearance

For many Polish companies, the problem with exporting to the UK does not start at the border, but much earlier: when gathering the data needed for clearance. If sales, the warehouse and logistics are all working from different versions of the information, the risk of error grows before the goods are even loaded.

So instead of yet another general list of "paperwork", we have prepared a checklist of the data and documents worth having ready before clearance. If you need operational support with exporting, also see our page Export to the UK.

1. EORI and company details

The starting point is the EORI number and consistent company details used across commercial and customs documents. If the EORI number or entity details are incorrect, the rest of the process starts to wobble from the very beginning.

If EORI is not yet sorted out, read our guide: How to get an EORI number in the UK and why you need one.

2. Goods data

• an accurate description of the goods,
• quantities and units of measure,
• the value of the goods,
• tariff code / classification of the goods,
• information on the origin of the goods, if relevant for preferences or documentation.

3. Commercial document

The commercial invoice should be consistent with the actual movement of goods and with the data used for the declaration. The most common problem is not a missing invoice altogether, but a description of the goods that is too general, inconsistent values, or missing counterparty details.

4. Transport documents and route data

• carrier details,
• port or terminal,
• vehicle and trailer registration number, if already known,
• planned departure and arrival date,
• information on whether the movement will go through the GVMS system.

5. Whether additional references or procedures are needed

Depending on the transport model and type of goods, you need to check whether additional elements apply, such as a GMR, ENS, transit, or declarations linked to border requirements. This is exactly where the costly gap between "we have the documents" and "we have the full data set for the movement" most often appears.

The most common mistakes made by companies exporting to the UK

• submitting data for clearance too late,
• a description of the goods too general for classification and declaration purposes,
• inconsistent data between the invoice, transport and declaration,
• assuming the carrier will "sort out" all the border formalities alone.

Checklist before contacting a customs agency

1. Prepare your EORI number and company details.
2. Gather the commercial invoice and the description of the goods.
3. Add information on quantity, value and tariff code.
4. Provide carrier details and the planned route.
5. Establish whether you will need a GMR, ENS, or a transit procedure.

Summary

Exporting to the UK does not start with submitting the declaration itself, but with getting your data in order. The earlier you gather correct information, the lower the risk of hold-ups and corrections right before departure. If you want to work through this step by step, send your documents for an initial review.

Official sources

• GOV.UK: Get an EORI number
• GOV.UK: Get a goods movement reference
• GOV.UK: Goods Vehicle Movement Service
• GOV.UK: Making an entry summary declaration
• GOV.UK: Get your goods through customs

Key intent: export to the UK

This material answers the query export to the UK and shows how to work through the topic step by step, without unnecessary corrections or operational delays.

FAQ

Where should you start exporting to the UK?

By organising the commercial data, documents and clearance responsibilities on both sides of the process.

Additional official source

• https://www.gov.uk/guidance/get-customs-data-for-import-and-export-declarations