Invoice control fails when teams rely on memory and urgency. A structured monthly checklist is faster and more reliable than occasional deep audits. The goal is not to inspect every line manually-it is to verify the fields that most often create expensive errors for Belgian SMEs: wrong EAN or period, indexation drift, capacity/peak misalignment, and contract–invoice mismatches. Running the same 12 checks every month builds a repeatable control and makes anomalies obvious over time.
1. Identity and period checks
- 1. Supplier name and VAT number match the contracted entity (avoid paying an invoice from a group brand or merged entity you did not sign with).
- 2. Site address and EAN (18 digits) map to the correct metering point; wrong EAN can mean you are billed for another site.
- 3. Billing period start/end dates are continuous with the prior invoice-no gaps or overlaps that could double-count or miss consumption.
- 4. Invoice number and issue date are unique and traceable for disputes and audit.
2. Pricing and contract checks
- 5. Contract type (fixed/variable) is applied as agreed; variable contracts will show indexation-driven changes.
- 6. Unit price logic reflects the contract and current period-energy, capacity, and distribution components should align with your tariff sheet or last agreed amendment.
- 7. Indexation parameter and reference period (e.g. Belpex, gas index) are documented and consistent with the contract; check that the applied index and date range match.
- 8. Standing charges and network components (distribution, capacity, metering) match the expected structure for your connection and region.
3. Consumption and anomaly checks
- 9. kWh consumption (and gas if applicable) is plausible vs operational activity and prior months; flag large unexplained swings.
- 10. Capacity/peak component is reviewed separately-check stated peak (kW) and the capacity line; a single high 15‑minute interval can drive this line up even if total kWh is stable.
- 11. Tax and surcharge blocks (federal, regional, contribution types) align with the invoice period and your contract.
- 12. Any material deviation is logged with quantified impact (€ and cause) so you can spot patterns (e.g. same supplier, same error type) and prepare disputes.
If your process stops at total amount verification, you will miss the structural errors that repeat over months-wrong EAN, indexation drift, or capacity mischarges.
4. Who should own which part of the checklist
Identity checks (1–4)
Can sit with whoever first receives or registers the invoice-often finance or admin.
Pricing checks (5–8)
Need someone with access to the contract and tariff sheet, and ideally to last month's invoice for comparison.
Consumption checks (9–12)
Benefit from a quick cross-check with operations if consumption or peak looks off.
Define one owner for the full 12-point pass so nothing falls between chairs; that person can delegate specific items but remains accountable for "checklist done before approval".
If your organisation is small, the same person may do all 12; the important thing is that the checklist is completed every month and exceptions are logged, not that roles are split.
5. When to use a tool vs when to do it in a spreadsheet
A spreadsheet is enough to run the 12-point list and keep an anomaly log-list the checks, tick them off, and note any deviation with € impact and cause. As volume grows (multiple sites, multiple suppliers) or when you want to automate period continuity, EAN validation, or amount reasonableness, a dedicated invoice control or audit tool can save time and reduce human slip. The principle stays the same: mandatory fields checked, exceptions flagged, and evidence ready for dispute. Start with the checklist in the simplest form that gets done every month; add tooling when the manual process becomes a bottleneck or error risk.
If you already receive structured (e.g. Peppol) invoices, a tool that reads the structured format and highlights mismatches against contract or prior period can shorten the 12-point pass significantly.
6. How to handle the first month: building the baseline
The first time you run the full 12-point checklist, it may take longer-you are establishing the baseline. For each invoice, note the supplier, EAN, period, contract type, and key unit prices or indexation references. Save a copy of the contract excerpt or tariff sheet you use for checks 5–8 so next month you can compare quickly. If you find an error, log it with € impact and add it to your anomaly register; if you open a dispute, attach the same evidence you used for the checklist so the supplier sees exactly what you are challenging.
By the second month, you will have last month's notes and (if you use one) a spreadsheet or tool template. The 12-point pass becomes faster because you are comparing to a known baseline instead of building it from scratch. By the third month, recurring issues (e.g. same supplier always late on indexation update, or one site with period alignment problems) will stand out and you can address root causes.
7. Linking the checklist to your approval workflow
The checklist should sit in front of approval, not after. Define a simple rule: "No approval or payment until the 12-point pass is done and any material exceptions are logged or escalated." That way the checklist is not an optional extra but a gate. If your approval tool or ERP supports it, add a field or status like "Checklist completed (date)" or "Exceptions: none / see register" so approvers and auditors can see that the control ran.
If someone bypasses the checklist (e.g. urgent payment), document the reason and ensure the invoice is still reviewed retrospectively-and that the anomaly register is updated if something was missed. Over time, the habit of "checklist first" reduces both errors and the need for firefighting later.
How to implement this without slowing approvals
Assign two levels: automatic validation for stable checks and manual review only for flagged exceptions. Keep an anomaly register with tags for period, supplier, and issue type. Within two to three cycles, recurring patterns become obvious and dispute preparation becomes much faster.