# Commission Implementing Regulation (EU) 2020/2244 of 17 December 2020 laying down rules for the application of Directive (EU) 2017/1132 of the European Parliament and of the Council as regards technical specifications and procedures for the system of interconnection of registers and repealing Commission Implementing Regulation (EU) 2015/884 (Text with EEA relevance), Division 8: Structure and use of the unique identifier

Extent: E+W+S+N.I.

The unique identifier for the purpose of communication between registers shall be referred to as the EUID (European Unique Identifier).
The structure of the EUID shall be compliant with ISO 6523 and shall contain the following elements:
EUID element
Description
Additional description
Country code
Elements making it possible to identify the Member State of the register
Mandatory
Register Identifier
Elements making it possible to identify the domestic register of origin of the company and of the branch respectively
Mandatory
Registration number
Company/branch number refers to the registration number of the company/branch in the domestic register of origin
Mandatory
Verification digit
Elements making it possible to avoid identification errors
Optional
The EUID shall be used to unequivocally identify companies and branches for the purpose of the exchange of information between registers via the platform.

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Source: https://www.legislation.gov.uk/eur/2020/2244/annex/division/8 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-2244/annex/division-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.