Correct a Peppol invoice with a structured credit note
How Belgian B2B sellers reverse or reduce a sent Peppol invoice: issue a BIS CreditNote, reference the original, and never edit a document already on the network.
Updated
The job: fix amounts after the invoice left Peppol
Once a structured invoice is delivered on Peppol, it is the baseline in both parties' systems. Returns, price errors, partial cancellations, or post-invoice rebates with VAT impact are corrected with a Peppol BIS CreditNote, not by changing the original file or agreeing a lower payment by email.
For the commercial role of a credit note versus invoice or quote, see Invoice, credit note, and quote. This article covers the correction workflow only.
Do not edit a sent invoice
| Temptation | Why it fails | Correct move |
|---|---|---|
| Edit amount and resend the same invoice number | Duplicate or conflicting documents; open items stay wrong | Credit note (full or partial), then new invoice if needed |
| Ask the customer to "pay less" by email | Peppol invoice still shows the full amount; VAT and dunning stay misaligned | Structured credit for the delta |
| Send only a PDF credit note | Mandate and AP automation need the XML CreditNote | Transmit CreditNote via your Access Point |
The original structured invoice stays as issued. The credit note is the controlled amendment.
Reference the original invoice
Belgian VAT practice and Peppol BIS expect a billing reference to the invoice you are adjusting (BillingReference / InvoiceDocumentReference: invoice number and, where required, issue date).
Without that link, AP cannot auto-match, VAT evidence is weak, and validation or disputes get harder. Partial credits still need a clear source invoice; line-level detail keeps VAT categories consistent with the supply you are reversing.
Practical Peppol credit-note workflow
- Identify the delivered invoice (your number and Peppol delivery record).
- Issue a credit note in your billing tool: own numbering sequence, line detail, VAT categories aligned with the original supply.
- Set the billing reference to that invoice.
- Validate against EN 16931 / Peppol BIS rules before send (same strictness as invoices; see EN 16931 and UBL).
- Send as document type CreditNote through your Access Point.
- Confirm network delivery, archive the structured original, match remittance to the reduced open balance.
Full cancel: credit the full invoice amount. Price correction: credit only the delta; issue a new invoice if a replacement charge applies. Do not mutate the sent invoice.
VAT and automation
For VAT-liable sellers, the credit note reduces VAT in line with the original treatment (standard, reverse charge, exempt, and so on). Your customer's system posts a matching reduction when they receive the Peppol CreditNote. Informal shortcuts break that symmetry and reintroduce manual AP work.
If invoices already follow the Belgian structured e-invoicing obligation (2026), enable credit notes in the same platform. Treat them as a normal billing document type, not an offline exception.
- BIS CreditNote
Peppol billing document (usually UBL CreditNote XML under EN 16931) that structurally reduces or cancels amounts on a previously issued invoice.