Relation, authorisation and sequence errorsRelation & missing element

CDS12115Relation error: Declared Procedure Code (DE 1/10 and / or 1/11)  mandates the use of Additional Document (DE 2/3) 185C

HMRC explanation

Relation error

You have not have declared document code 185C (Claim to Visiting Forces Relief for goods removed from a customs warehouse), required for the additional procedure code entered.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence

What to check across the Relation, authorisation and sequence errors

Two elements, or a value and a rule, disagree. Read both elements together: completing one element with a particular code often requires another value, and the fault is frequently in the element you did not change. The family also covers parties and authorisations that are not recognised, references that must be unique, and messages sent out of sequence.

A declaration that clears CDS can still be wrong

The free eligibility checker confirms your import activity and whether a free post-clearance audit applies. No data upload, no commitment.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence