Relation, authorisation and sequence errorsRelation & missing element

CDS12120Relation Error: The appropriate authorisation has not been declared for this Declaration Type (D.E. 1/2)

HMRC explanation

Authorisation error

You may not have declared an authorisation required for this declaration type. If you have declared the correct authorisation, check the authorisation number declared on the 'Additional documentation' page.

For SDP declarations, you need document code C512 For EIDR declarations, you need document code C514 For submitting an arrived export declaration, data element 3/39 must include one of the authorisation type codes CSE or EXRR.

You may have declared an authorisation that has expired; or the reference number does not belong to the party on the declaration; or the reference number provided is not recognised.

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.

Run a free audit

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