5/23 code check starts today, UK importers need Appendix 16D before this week's CDS submissions

HMRC today published guidance for Internal Temporary Storage Facilities and Data Element 5/23 in the Customs Declaration Service. It says agents should “find a list of codes” for entries using Data Element 5/23. The note identifies “the location where the goods may be examined” in ITSFs, so active filers need to check workflows now. For importers and brokers, this is a same-day reference-data update, not something to leave for month-end housekeeping.

What the source says

The change is live now, not a future consultation or a technical footnote for later release planning. From today, customs agents filing CDS declarations for goods in ITSFs need the newly published Appendix 16D codes. Those codes sit inside Data Element 5/23, which is used to identify the examination location for the goods. That matters this week because declaration teams often work from saved templates, broker playbooks, and internal reference tables. If those references are stale, filings can slow while staff verify the right code before submission.

What RecoupIQ’s data shows

The exposure here is concentrated, not broad, and it sits in trade-linked operators rather than across the wider UK SME base. The first line of impact is customs agents, freight forwarders, and importers routing goods through Internal Temporary Storage Facilities. In our regulatory signal tracking, same-day HMRC operating updates are an immediate process-risk flag for businesses that outsource declarations. One small reference-data change can affect several client filings at once when the same agent or team handles the work. That makes this more of a networked execution risk than a balance-sheet event.

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What this means for UK creditors

For suppliers, lenders, and credit teams, this is a practical check on customers exposed to cross-border goods movements. Ask whether their customs agent has updated Appendix 16D and tested Data Element 5/23 workflows before promising delivery dates or payment timing. The risk is concentrated in accounts with live customs activity, not spread evenly across a portfolio. If a debtor already runs tight on working capital, even short administrative friction can push cash collection further out. Where goods release and invoice payment are closely linked, a filing hold-up can quickly become a credit-control issue. This is the kind of small operational change that deserves attention because it arrives without a long bedding-in period.

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