Filing is not the final step. Once HMRC accepts a declaration, a specific reference number confirms it, and that number matters for everything that follows.
The Movement Reference Number
Once HMRC accepts your entry, it issues a Movement Reference Number, or MRN. This is the proof that the declaration has gone through and the reference used if anything about the shipment needs to be checked or queried later. Before this stage, make sure your data is validated and any representation type has already been agreed. This customs declaration UK guide covers the earlier steps that lead up to acceptance.
What to do with the MRN
Keep the MRN on file alongside the shipment paperwork. For repeat shipments with the same client, having previous declarations and their MRNs on hand also speeds up future filings.
FAQs
Is the MRN the same for every leg of a shipment? No, each declaration generates its own MRN.
What if I lose the MRN after acceptance? It should still be retrievable through your CDS-connected software's record of past submissions.
Acceptance is the milestone, but keeping good records afterward is what makes the next filing faster. Watch a demo
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