Relation, authorisation and sequence errorsRelation & missing element

CDS12080Relation error: Combination of Addition / Deduction codes (DE 4/9) is not allowed

HMRC explanation

Relation error

You have used a mix of addition or deduction codes for an item that is not permitted. Certain addition/deduction codes cannot be declared together.

Additions and deductions should only be declared at header level where they apply to all good items on the customs declaration.

Each addition or deduction code can only be declared once at header level. The same addition or deduction code cannot then be declared at item level as well.

If a specific addition or deduction is being declared at item level, that addition or deduction may only be declared once per item.

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.

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