For accountancy & fiduciary firms in Belgium
Your bulk client-invoice export in. One reviewed gap report per client folder out — plus a short rule-watch note when the rule set moves. You see which folders carry invoices that will bounce, before they cost anyone time.
A monitoring layer for the whole client book — not another tool your staff has to learn. Reports are written to be read, then forwarded.
Rapporten en antwoorden in het Nederlands mogelijk. · Rapports et réponses possibles en français.
Pilot open · capped at five firmsThe Belgian B2B e-invoicing mandate has been live since 1 January 2026 for businesses established in Belgium. The general three-month tolerance ended on 31 March; a narrower self-billing tolerance ran through 30 June. The specific graduated fines for lacking the technical means to issue and receive structured invoices rise from €1,500 to €3,000 and €5,000. A single client sees its own bounced invoices. A fiduciary sees the pattern: the same data faults — identifiers, references, VAT arithmetic, rounding — recurring across dozens of folders.
And there is a legal clock on incoming invoices. Under Article 8.11, §4 of the Belgian Civil Code, an invoice accepted by an undertaking, or not contested within a reasonable period, can serve as evidence against it. That makes timely review of incoming invoice problems operationally important.
The administration itself has kept adjusting course — its FAQ was extended in May 2026 with guidance on the rejection procedure — and the validation artefacts are maintained and re-released. Peppol BIS Billing release 3.0.20 is currently mandatory, while OpenPeppol has published release 3.0.21 for mandatory use from 17 August 2026. Somebody at the firm has to watch all of this. That is the job this service takes over.
Each client's invoices checked against the official published Peppol BIS Billing 3.0 artefacts — a verdict, plain-language findings ordered by who fixes what, and the technical rule citations kept underneath for the software vendor.
One page across all folders: which are clean, which carry blockers, and which faults repeat across clients — the fastest way to see where one settings fix clears ten folders.
When the validation artefacts are re-released or published guidance changes in a way that affects your book, you get a short note saying what changed and what, if anything, to do. If nothing moved, the note says exactly that.
Sample · real engine output
This sample is a real run of our diagnostic engine on a synthetic Belgian test invoice seeded with typical faults — an invalid enterprise number behind the Peppol address, a missing buyer reference, VAT arithmetic that does not add up, a rounding slip. Every name and number in it is fictional; the checks, rule citations and report are exactly what the service produces.
View the sample gap report →Nothing continuous, nothing installed. This is a monthly batch service on files you already have. Before receiving live client data, we agree a secure transfer channel, retention and deletion terms and, where applicable, processor terms. Anonymized exports are preferred.
Free tools exist that explain a single error in a single file, and fix-it products exist for individual invoices. This service deliberately sells neither. It is the layer above them: the whole client book, on a monthly rhythm, reviewed by a person, with the rule-watch attached — so the firm knows where it stands without anyone pasting files into web forms client by client.
Per-client conformance status, plain-language findings, fix ownership (settings vs. records vs. software vendor), rule-watch. Your reports are yours — forward them to clients or vendors as you see fit, under your own cover.
We do not alter client files, do not submit or deliver invoices, do not replace your accounting platform or Peppol Access Point, and do not give tax or legal advice. The reports tell the people who fix things exactly what and where.
Priced per firm, by the size of the client book. A client folder is one client entity's invoice export for the month. Supported export format, expected invoice/file volume and file size are agreed before the service begins.
€149 / month
€249 / month
Pilot terms, stated plainly. The pilot is capped at five firms so every report gets real review time. The first month is paid — it is the service, not a demo. Cancel any month, by email, no notice period. If the reports don't earn their keep, stop paying for them.
By email · two minutes
The button opens a pre-addressed email — fill in the three lines and send. You will get a straight answer on whether a pilot place is open, and the first batch can run on your next monthly export.
Request the pilot →Or write directly: einvoice@londonbridgeventures.com · subject: [BE-FIDUCIARY] Pilot request
London Bridge Ventures builds e-invoicing compliance tooling, including Peppol and UBL validation. The service combines automated validation against the official published artefacts with human review of every report — so what reaches you can go straight into a client conversation. You may write in Dutch or French; replies come in your language.
Technical conformance monitoring and reporting only · not tax or legal advice · not a production acceptance verdict · final delivery, production validation and exchange remain with each client's Peppol Access Point provider · dates, scope and penalty figures per the published Belgian framework (efacture.belgium.be; Law of 6 February 2024; Royal Decree of 8 July 2025).