Event invoice discrepancy log
Three suppliers have invoiced amounts that differ from the order, and the emails about them are scattered across four inboxes.
The short answer
An invoice discrepancy log is a single table where every mismatch is recorded: what the invoice says, what the order or delivery says, the difference, who is chasing it and how it ended.
It keeps payments on hold for a reason, keeps suppliers' answers in one place and gives finance a clear record at close.
What counts as a discrepancy
- Quantity differs from the order or from delivery evidence.
- Unit price or total differs from the order or quotation.
- Tax or service charge is shown differently from the order.
- Charges appear that the order or an approved variation does not cover.
- The same invoice reference, or the same amount for the same supplier, appears twice.
- Supplier details on the invoice, including bank details, differ from the supplier record.
What each log entry records
| Field | Why it is there |
|---|---|
| Supplier, invoice reference, date | Identifies the document without relying on memory. |
| Order reference and line | Shows what it was matched against. |
| What the invoice says, and what the order or delivery says | Makes the difference visible in figures. |
| Difference amount, and in whose favour | Shows the size and direction. |
| Owner and date raised | Someone is responsible for chasing. |
| Supplier response, with date | Keeps the answer with the case. |
| Outcome | Corrected invoice, credit note, approved difference, or paid as invoiced with approval. |
How to work a discrepancy
- Log it the day it is found and put the invoice on hold in your payment tracker.
- Tell the supplier in writing exactly which line differs and what you expect to see.
- Ask for a corrected invoice or a credit note, not a verbal assurance.
- Record the reply. If the supplier disputes your reading, check the order and variations again and pass the question to the approver.
- When a corrected document arrives, re-match it and release or keep the hold.
- Close the entry with the outcome and the document that proves it.
Bank details need extra care
If an invoice shows bank details that differ from the supplier record, treat it as a discrepancy and do not pay. Check it using a contact method you already hold for the supplier, not the details on the invoice.
The supplier bank-detail verification process covers this check.
Closing the log
Before final reconciliation, no entry should be open without an owner and a next action. Feed outstanding items into the final financial reconciliation, and track credit notes in the credit note tracker.
Worked example · Fictional example
A log with three entries
Fictional organisation and figures, illustrative only.
Persatuan Fiktif Doktor Veterinar logs three problems after its seminar. The printer invoiced 1,200 programme booklets against an order for 1,000. The AV supplier invoiced a technician day that is not in the order or any approved variation. The venue's invoice reference matches one already paid.
The secretariat puts all three on hold. The printer issues a credit note for 200 booklets. The AV supplier sends the signed variation, found in the project lead's folder, and the entry is closed as approved. The venue confirms the duplicate and the treasurer records that the second invoice is rejected.
Use this yourself
Invoice discrepancy log
Copy this table and add a row each time a mismatch is found. Do not delete closed rows.
| Supplier and invoice ref | Order ref and line | Invoice says / order says | Difference | Owner and date raised | Supplier response | Outcome |
|---|---|---|---|---|---|---|
| Printer, INV-501 | PO-24-140 line 1 | 1,200 booklets / 1,000 ordered | 200 booklets, in supplier's favour | Secretariat, 12 Oct | Agreed to credit | Credit note received, matched |
| AV supplier, INV-88 | AV-02 | Technician day charged / not on order | One technician day | Project lead, 12 Oct | Sent signed variation | Approved difference, paid as invoiced |
| Venue, INV-3310 | V-01 | Same reference as paid invoice | Duplicate | Treasurer, 13 Oct | Confirmed duplicate | Second invoice rejected |
Handle it in-house, or bring in help?
Your team can usually handle this when
- Few invoices and a small team that can chase suppliers directly.
- Orders and variations are complete and easy to find.
- Differences are rare and quickly settled.
Outside planning help earns its fee when
- Many invoices arrive after the event and several people are chasing suppliers.
- Variations and orders are scattered across inboxes.
- Final accounts are due and open differences are holding up payment.
Want discrepancies chased and closed?
A conference project lead can keep the invoice discrepancy log, chase suppliers for corrected documents, bring missing variations and delivery records together and hand finance a clean list of open and closed items. Payment approval and any dispute decision stay with your organisation.
Questions organisers ask
Should we pay the undisputed part of an invoice?
Ask your finance lead and check the payment terms. Practically, many organisations ask for a corrected invoice so the amount payable is clear.
Who should hold the log?
One person, usually the secretariat or project lead, with read access for finance.
What if the supplier will not correct the invoice?
Record the position and take it to the person who signed the contract. Disputes over what the contract requires are for your legal adviser.
Is there a tool to help?
The invoice reconciliation worksheet flags mismatched quantity, price and duplicate references from entries you type in. It does not connect to finance systems or make payments.
Related resources
Content record: Draft. Written from the cited sources and checked by automated rules; not yet independently reviewed.