Validated, not assumed.
Every preference claim over €6,000 rests on a valid Registered Exporter (REX) number. BorderAudit validates REX numbers directly against the EU registry — catching revoked registrations, lapsed authorisations and mismatched exporter details before HMRC does.
A preference claim is only as strong as the number behind it.
Statements on origin under EU-linked agreements depend on the supplier’s REX registration being valid on the day. When it isn’t, the claim doesn’t fail loudly — it fails years later, when HMRC re-examines the entry and asks for the evidence. That’s why REX validation is one strand of the wider origin & preference audit.
What happens without REX validation.
- 1Preference claim filed
- 2HMRC tests the REX number
- 3Registration revoked or lapsed
- 4Preference denied
- 5Full duty assessed — plus delays and resubmission
- 1Claim prepared on the platform
- 2REX number validated against the EU registry
- 3Status and exporter details confirmed
- 4Claim filed with the evidence attached
- 5Accepted first time — as 91% of our claims are
Many customs workflows still rely on manual checks against the public EU portal — one exporter at a time — or skip the check altogether. BorderAudit validates programmatically, at declaration-book scale, inside the same workflow that prepares the claim.
REX numbers, validated — in 50 seconds.
The REX registry is the EU’s database of exporters authorised to self-certify origin, maintained by the European Commission’s Directorate-General for Taxation and Customs Union (DG TAXUD). The public portal answers one lookup at a time. BorderAudit checks every REX number on every statement on origin — status, validity dates and exporter identity — as part of the audit itself.
Numbers are lifted from the documents by document intelligence and validated the moment they’re read — no rekeying, no lookup queue.
Every registration, tested six ways.
Four checkpoints, zero manual lookups.
Validation isn’t a report you run — it’s wired into the moments where a bad number could do damage. Not sure where your book stands? Start with the free compliance check.
- 01 · EXTRACTIONThe number, read at sourceDocument intelligence lifts the REX number — and the exporter details around it — straight from the statement on origin.
- 02 · TRIGGERThe threshold, appliedPreferential claims above the €6,000 value threshold queue for validation automatically. No manual intervention, no missed checks.
- 03 · REGISTRYThe registry, checkedA direct check against the EU database maintained by DG TAXUD — registration status, validity dates and exporter identity in one pass.
- 04 · RE-CHECKChecked again before filingEvery REX number referenced in a reclaim file is re-validated before submission — so a registration revoked since the first check never reaches HMRC.
Claims that hold, because the numbers behind them do.
REX validation, answered.
See your REX exposure before HMRC does.
A 30-minute call with a customs specialist. We’ll walk through how your preference claims are evidenced today, where REX validation fits, and what an audit of your declaration book would surface.
Every REX number. Validated.
A statement on origin is only as strong as the registration behind it. BorderAudit checks every one against the EU registry — free to start, flat pricing, never a success fee.

