The particulars don't reset
VAT Notice 700, section 18, treats a credit note as carrying the same required particulars as a full VAT invoice: supplier and customer details, a description of what's being adjusted, the VAT rate, and the value of the adjustment. Regulation 15C of the VAT Regulations 1995 sets out the mechanics. None of that particulars list gets shorter just because the number on the page is negative.
The one thing a credit note adds
What a credit note needs beyond an ordinary invoice is a clear link back to the supply it corrects: which original invoice, by number and date. Without that reference, a credit note is an unexplained negative figure sitting in the records. Nothing ties it to a transaction that was actually accounted for in the first place, which is exactly the link that would be asked for if the adjustment were ever queried.
Where this goes wrong in practice
- A supplier issues a credit note with its own sequential number but never states which invoice it corrects.
- The credit note lands in a different VAT period from the original invoice, and nobody flags the two documents as related.
- The adjustment is applied to the ledger by amount alone ("reduce this month's purchases by £X") with no document trail connecting it to a specific prior supply.
Each of these is invisible until someone goes looking for the connection, usually during a query or a reconciliation, by which point getting a straight answer from the supplier takes longer than it should.
What to check on every credit note
Beyond the standard invoice particulars: does it identify the original invoice by number and date? Does the VAT rate and treatment match what was originally charged? And is the document held alongside the invoice it corrects, rather than filed as an unrelated adjustment?
NoticeDesk runs the full 16-check suite on a credit note exactly as it does on an invoice, plus a 17th check specific to credit notes: whether it states which original invoice it corrects. Where a matching invoice is also on file, NoticeDesk links the two records automatically for reference; the check itself passes or fails on presence alone. A credit note that omits the reference is flagged, visibly, with the gov.uk citation attached, the same way a missing VAT number is.