Advanced warning of TSS outage: update summary

A planned update on 23 March 2024 will require a short downtime of the TSS Portal, from 8pm on Saturday 23 March until 4:30am on Sunday 24 March.

This latest release will provide updates to several user guides as well as updates to the portal as shown below.

  1. Changes to the Document Records in the Company Profile

Within the Documents Records section of the company profile, you’ll find that a new field called Associated EORI becomes available when you’re adding a ‘UKIMS’ Document Record

You should complete this field with the GB or XI EORI that is aligned to your UKIMS Authorisation, i.e. the EORI the trader used when you applied for UKIMS.

TSS will use the completed UKIMS Authorisation Number and Associated EORI to populate required fields on the declaration. This means you don’t have to enter your UKIMS authorisation details every time you declare NIREM on a goods item line.

Please note that the Associated EORI field is mandatory when adding the Document Type ‘UKIMS’ to the Document Records. The field will only accept the GB EORI or XI EORI listed in your company profile.

Once you’ve submitted, the field will be read only and if you’ve completed incorrectly, you’ll receive the following error message:


Changes will also apply to the Authorisation/Document Reference Number field within the Document Record.

When the Document Type ‘UKIMS’ is selected, this field will only accept the following format: ‘XIUKIM’ followed by 12-15 digits. This will be the EORI number followed by YYYYMMDDHHmmss


If the format entered isn’t correct, you’ll receive this error message:

  1. New Additional Information Codes in CDS for Authorisation by Customs Declaration

Authorisation By Customs Declaration (ABD) is a method of import which enables Traders to import goods under the following special procedures without the need for a pre-approved authorisation:

  • Outward Processing (OP)
  • Inward Processing (IP)
  • Temporary Admission (TA) 
  • Authorised-Use (known as End-Use in Northern Ireland)

TSS provides traders with the option to use Authorisation by Declaration through a Full Frontier Declaration. This update will include two new Additional Information (AI) Codes to support ABD requirements, available for use from 24 March 2024. For the full list of AI Codes and accompanying guidance, you or your representative should refer to GOV.UK. 

The two new AI Codes will be available in TSS from 24 March 2024, are:

  • ABDIN: this code denotes a request for use of a Special Procedure under Authorisation by Declaration depending on the procedure code entered in the Full Frontier Declaration – AI code 00100 must be declared in addition to ABDIN 
  • ABDOU: this code is subsequently used when the goods are being removed from the Special Procedure from which they were entered using Authorisation by Declaration – AI code 00100 must be declared in addition to ABDOU 

Please note you must not declare AI codes ABDIN and ABDOU before 24 March 2024, otherwise your declaration will be rejected.

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