The Declaration Unique Consignment Reference (DUCR) and the optional Part suffix is the main reference key to any Customs Handling of Import & Export Freight (CHIEF) declaration. It is also the primary data item for matching import consignments containing plants, flowers, fresh fruit and vegetables on the CHIEF Import declaration and any Procedure for Electronic Application for Certificates (PEACH) Advance Notification.

The standard format of a DUCR to be used in the National Export System is up to 35 characters, in 4 parts as follows: -

  • 1st part - year in which the DUCR was allocated i.e., ‘2’ for 2022
  • 2nd part – the country where the DUCR was allocated, typically GB for UK exports
  • 3rd part – EORI number of the trader (12 characters), followed by a hyphen (-)
  • 4th part - Unique series of characters, devised by the trader to enable an audit trail within their commercial records. This part is restricted to numbers, upper-case letters and certain special characters, namely 0 to 9, A to Z or a hyphen (-)

Example based on the above: 9GB123456789012-ABC1234

Latest News

...

HMRC Update - CDS System Maintenance Sat 27th - Sun 28th Sept 2025

Due to scheduled maintenance on the Customs Declaration Service (CDS), the CDS service will be…

...

Everything hauliers need to know about ICS2

Additional upcoming data requirements will be needed for EU or NI (XI) ENS to strengthen security…

...

An EU or XI EORI number is now mandatory for GB haulier EU imports

With the transition from ICS1 to ICS2 just around the corner, big changes are on the horizon for GB…

...

Complete guide to ELO (the new French customs requirement)

UPDATE 01/08/2025 - We have been informed by HMRC that French customs will be postponing the…

...

HMRC Update - ICS List of Stop Words

Please find below an updated list of stop words published by the EU.  As a reminder, a stop…

...

Introducing our new Business Development Manager, Ewa

We recently had a new addition to the CustomsLink team. Ewa has years of experience helping…