Error codes · CIUS-BE · Belgium

Belgian B2B invoices should use Peppol BIS Billing 3.0 in Belgium

This is the rejection, word for word: „[BE-01] Belgian B2B invoices should use Peppol BIS Billing 3.0. This validation rule ensures Invoice compliance with CIUS-BE (Belgium).“

Why this matters in Belgium

Belgium requires e-invoicing using Peppol BIS Billing 3.0 (UBL). A warning: the invoice is not rejected outright in Belgium, but it should be fixed.

Belgian e-invoicing regulations require this for legal compliance. Invoices missing this information may be rejected by Belgian government portals and business partners.

What to have readyThe correct figures from your bookkeeping; we show you which field is affected.

What we doReview your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-BE (Belgium).

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

How to fix BE-01

01Identify the issue in your invoiceBelgian B2B invoices should use Peppol BIS Billing 3.0. This validation rule ensures Invoice compliance with CIUS-BE (Belgium).

02Correct this in your invoicing softwareReview your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-BE (Belgium).

03Re-export and validateGenerate a new invoice export from your accounting system and re-validate to confirm BE-01 is resolved.

If you enter it yourself in your invoicing software

Before

<Invoice>
  <!-- Issue: Belgian B2B invoices should use Peppol BIS Billing 3.0 -->
</Invoice>

After

<Invoice>
  <!-- Issue resolved per CIUS-BE (Belgium) -->
</Invoice>

Belgium e-invoicing requirements

Phase	Status	Scope
B2G	Live (Nov 2022)	All federal government suppliers
B2B	Live (Jan 2026)	All Belgian VAT-registered businesses

Read on

BE-01, the full explanation →Belgium e-invoicing guide →All Belgium error codes →