Since 1 January 2026, invoices are delivered via Peppol. However, the dispute process has not changed: you still need to formally dispute any invoice you disagree with.
How do you dispute an invoice?
Deadline: the dispute must be raised within a reasonable timeframe, in practice 10 to 14 days after receipt.
Grounds: you must explain the reasons for your disagreement, ideally specifying that the grounds listed are given by way of example.
Proof: a verbal dispute is not sufficient. Ideally, you should have an email with a reply, a read receipt, or a registered letter for maximum security.
Important: it is not possible to dispute an invoice directly via Peppol.
On the BILLY side: if you dispute an invoice, let us know so that we can manually reject the document from your accounts.
Proof of delivery
Peppol now prevents late payers from claiming they never received the invoice: receipt is presumed.
You can also easily obtain proof of delivery. This is a digital signature that clearly confirms the validity of your invoice submission. Go to Income, Invoices and hover over the Peppol icon:
Conclusion
Even via Peppol, a disputed electronic invoice must be contested promptly, in writing, with grounds and proof — and outside of Peppol itself.
If you have any questions, feel free to reach out via the live chat at the bottom right 😊
The BILLY team