Relation, authorisation and sequence errorsRelation & missing element

CDS12087Relation error: VAT Declaring Party Identification (DE 3/40), where mandated, must be supplied at either header or item

HMRC explanation

Additional fiscal party

You have declared your additional fiscal party VAT number at both header and item level. It should only be declared at either item or header level. Or you have declared procedure code 1042 and not declared an additional fiscal references ID.

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