TSS: How to Avoid TIR Errors and Update Your EORI

TSS: How to Avoid TIR Errors and Update Your EORI

TL;DR: The TSS system's TIR errors are a key tool in the new EU–UK clearance model. In this article we cover the most important changes, their impact on businesses, and practical tips for preparing for the new requirements.

Current as of: 2025-10-04 – Scope of changes: 2025-09-11

What has changed?

We set out the key facts on this topic: when the changes take effect, the new obligations and requirements for businesses, and who the new rules apply to. The details are based on official notices from government bodies (GOV.UK, HMRC, the European Commission) and verified industry sources.

Why does this matter?

Changes to customs rules have a direct effect on the goods clearance process, delivery schedules and businesses' administrative obligations. Following the new rules helps avoid delays, financial penalties and the risk of shipments being held. Being aware of the new regulations lets companies optimise their logistics procedures and avoid unnecessary costs.

What to do now

• Check whether the changes apply to your business (type of goods, direction of movement, entity status).
• Contact a customs agency or adviser to make sure your declarations and documents are being completed correctly.
• Update your internal procedures and IT systems so they meet the new requirements.
• Train staff responsible for clearance and logistics on the new rules.
• Monitor official notices from GOV.UK, HMRC, the European Commission and Polish authorities so you can react to further updates as they happen.

Frequently asked questions

What are the main deadlines and requirements? – The deadlines are set out in government notices and in our article. The key dates are when the new rules take effect and the transitional periods.

What happens if you don't comply? – Not following the new rules can result in financial penalties, delivery delays, and even goods being held.

Do the changes apply to all businesses? – The requirements vary depending on the type of goods, the country of origin and the trader's status (e.g. AEO, importer, exporter).

Where can you find more information? – In the sources section below we include links to official documents. You can also contact Agencja Celna UK for a detailed analysis.

Sources and legal basis

The full list of sources used in this article is below. Make sure you're using the current versions of the documents and always check the publication dates:

• TSS Bulletin – reducing error messages and updating XI EORI (2025-09-11)

Disclaimer: This material is for information purposes only and does not constitute legal advice. Contact Agencja Celna UK for an individual consultation.

CTA: Get in touch with Agencja Celna UK for UK–PL customs clearance. Phone/Email/Contact link.

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