Header and item relation errorsRelation & missing element

CDS11007Relation Error: The submitter of the Additional Message differs from the original declaration.

HMRC explanation

Additional message cannot be accepted

A person linked to a different EORI number or different identification details cannot send a request to HMRC about the declaration, such as requesting a cancellation. Only the original declarant can send requests.

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

What to check across the Header and item relation errors

Values across the declaration do not agree, for example the total number of items against the items declared, or net mass against gross mass. Check the header totals against the item lines, the trade movement and declaration type against the requested procedure, and whether the element you are amending can be amended on this declaration type.

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