Peppol e-invoices can sometimes be rejected for various reasons, which can delay payments and create frustration. Understanding why your invoice was rejected and knowing how to fix it is crucial to ensure your transactions go smoothly. In this article, we’ll walk you through the most common causes of Peppol e-invoice rejections and provide simple steps to resolve them in Accountable.
A Peppol e-invoice may be rejected for several reasons, typically due to issues with the receiving party’s system or incorrect formatting. Here are some of the most common causes:
The client is not correctly registered on the Peppol network.
The VAT number is invalid or does not match the Peppol ID.
The invoice is missing mandatory information (e.g., invoice number, dates, totals).
There is a mismatch between the buyer's details and what’s registered in Peppol.
Technical validation errors in the UBL (Universal Business Language) structure.
When you send an invoice via Peppol through Accountable, our system actively monitors the delivery status. If the invoice is rejected, you’ll receive a notification within the app. The notification will typically explain the reason for the rejection (if available) and suggest the next steps to resolve the issue.ps.
If your Peppol e-invoice is rejected, don't worry! Here’s what you should do:
Review the rejection reason: The notification should provide a clear reason for the rejection. Common reasons are usually related to small errors in the data.
Correct the invoice or client’s information:
Double-check the VAT number and ensure the address details are accurate.
Make sure all mandatory fields (e.g., invoice number, dates, totals) are correctly completed.
If necessary, contact your client to confirm their Peppol registration and ensure they’re listed correctly in the network.
Resend the corrected invoice: Once the issue is fixed, you can resend the corrected invoice through Peppol directly from Accountable.
Yes, you can still send the invoice if Peppol isn’t an option or if the rejection can’t be resolved quickly. In these cases, you can:
Send the invoice by email or as a PDF: While this bypasses the Peppol network, it ensures your client still receives the invoice.
This option helps you avoid delays while waiting for issues with Peppol to be resolved.
If you have any questions or need additional help, feel free to reach out to us at support@accountable.eu.
Author - Valesca Wilms
As content marketing lead at Accountable Belgium, Valesca writes about freelancing, self-employment, and taxes based on her own experience as a freelancer.
Who is Valesca ?Thank you for your feedback!
Useful
As a self-employed individual with a sole proprietorship, your income is taxed under the personal in...
Read moreStarting from 2026, all self-employed individuals will need to send their invoices electronically in...
Read moreThe VAT reverse charge is a complicated word for a simple concept. It helps you purchase and sell sm...
Read moreThey always answer right away to any question I have, they provide clear answers, and they are very patient even when I struggle to understand. They try to explain in different ways. They are very helpful, responsive and friendly.
Chiara Marradi
01/05/2026
Everything was great! All my questions were answered quickly and in a friendly manner.
Wenzeslawa Wegener
04/05/2026
In the world where everyone seems to be out to get small entrepreneurs and overwhelm them with new rules, more taxes and reporting obligations, Accountable often feels like the one steady partner that actually wants you to succeed, providing quick, clear and personalised support. Thank you!
Janina Arsenjeva
10/04/2026
This is an amazing application with great support on issues. In short as in day I am addicted to it (in a positive way). I myself is from IT project management and the way they have captured the user requirement, it’s phenomenal.
Sumit Tewary
01/12/2024
UI is great. Feature packed and very easy to use. The team at Accountable were VERY quick to respond and their team of technicians soon had a fix in place. Very happy with the level of service so far. Thumbs up from me!
Dean Osborne
14/06/2023
This program is a lifesaver, and it is always improving. Plus, it has an AI chat feature that is actually useful.
Jeffrey Humble
14/01/2026
The coaching session on tax management was excellent, good material, excellent explanations and very insightful. Combined with the AI I never feel alone with Accountable.
Sergio Barbarino
23/04/2026
The availability of your team to help and guide people to understand their finances better is what really makes Accountable valuable. While the AI is able to give answers to most basic questions, specific scenarios need counsel from a human which your team performs beautifully.
Sofiya Bogdan Neves
18/04/2026
Fast and careful answers from Alina. Top service. Thank you.
Anonymous
15/04/2023
They always answer for questions wherever is via direct e-mail or through app. If they can’t answer fully they will forward you to the right place. Documents were always prepared well and ready to send further to government. Everything is intuitive in the app and easy to sort out even for someone completely green in this field.
Anonymous
22/03/2026
