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Credit Notes

A credit note reduces or cancels an invoice. It is an accounting document with a specific job, and it is regularly used for something else — as a way of settling an argument quietly — which is where it causes trouble.

For a software-side reference alongside this discussion of invoicing, records, and payment administration, Monitask has this resource.

When one is required

A wrong invoice. Wrong entity, wrong amount, wrong tax treatment. You cannot simply edit and resend an issued invoice, particularly where the customer has entered it into their system.

Work not done. A cancelled element, a variation withdrawn, a stage not reached.

An agreed reduction. A goodwill adjustment, a settled dispute, a discount applied after issue.

And a genuine return where materials came back.

In each case the credit note references the original invoice number, and where a corrected invoice follows, that references both.

What to write on it

The original invoice number and date.

The amount credited, and whether it is partial or full.

The reason, in one plain line. "Correcting entity name — see invoice 218a" or "Second radiator not fitted at customer's request, 14 May."

And the tax treatment mirroring the original, which is where credit notes most often go wrong and where a finance department will reject one.

The reason line matters more than it looks

It is the record of why the figure changed.

A credit note saying "adjustment" tells nobody anything, and two years later — when somebody is reconciling, or when a dispute revisits the job — it reads as an unexplained reduction.

Worse, an unexplained credit note can be read as an admission. A customer arguing that the work was defective will point at a credit note with no stated reason as evidence you agreed.

One line, stating the actual reason, removes that entirely.

The concession that is not a correction

Where a customer disputes and you decide to reduce rather than argue, say what you are doing.

"I don't accept that the work was defective, but I'd rather settle this than spend another month on it. Crediting £200 as a commercial settlement."

That sentence costs nothing and it does two things: it records that the reduction was pragmatic rather than an acceptance of fault, and it makes clear this is a one-off.

Without it, the credit note is the only record, and the only record says you reduced the bill after they complained. The same reasoning applies to the dispute itself.

What a credit note does not do

It does not cancel the debt if the customer has already paid — that produces a credit balance, which is a different thing on the statement and eventually a refund.

It does not restart any clock. A corrected invoice does; a credit note against an unpaid one leaves the corrected invoice's date as the reference point.

And it does not settle a dispute by itself. A credit note issued without an agreement is a unilateral reduction, and a customer who wanted more will treat it as an opening position.

Getting the agreement first

Where the credit relates to a disagreement, agree the figure before issuing.

One message: "I'll credit £200 and we'll call it settled — confirm and I'll send it through."

A confirmation before the document means the document closes the matter. A document sent first invites a negotiation about whether it is enough, and you have already moved.

The pattern to watch in yourself

A firm issuing credit notes regularly has a problem upstream.

Count them once a year. Three or four against a hundred invoices is normal. Fifteen is a signal, and the signal is almost never about the credit notes.

Wrong entities repeatedly means the check is not happening at quoting stage.

Reductions after complaints repeatedly means either the work or the expectations are being set wrong, and expectations are set in the quote.

Withdrawn variations repeatedly means they are being agreed too loosely in the first place.

The credit note is the symptom and the fix is always earlier, which is the argument this whole site makes in a different form each time.

Numbering and records

Sequential, in their own series or in the invoice series consistently.

Kept with the job, alongside the invoice it corrects and the message that explains it. Two years later this is the file somebody reads.

And reflected on the statement in the period issued, so both sides reconcile to the same figures.

When a customer asks for one they are not entitled to

It happens, and refusing needs to be as plain as issuing.

"I'm not going to credit that — the work was in the quote and it was done."

No long justification. A short refusal with a reason invites a specific response; a long one invites an argument about each paragraph.

Offer the evidence rather than the argument. The quote, the variation, the photographs — attached, once, with a line saying what they show.

And be willing to be wrong. Where they turn out to be right, issue it promptly and say so. A supplier who corrects an error quickly is trusted; one who resists every reduction on principle is disputed with more often, because customers learn that the first answer is always no.

Timing

Issue promptly once the reason is settled.

A credit note held back while you decide whether to argue leaves an invoice on both ledgers that neither side believes in, and it will surface on the next statement as a question.

Same week is the standard worth keeping.

The short version

• A credit note reduces or cancels an issued invoice, and an issued invoice cannot simply be edited and resent
• Required for wrong invoices, work not done, agreed reductions and genuine returns, always referencing the original
• Write the reason in one plain line: an unexplained credit note can be read as an admission of fault
• Where the reduction is pragmatic rather than accepted fault, say so in the covering message
• Agree the figure before issuing, or the document becomes an opening position in a negotiation
• Mirror the original tax treatment, number sequentially, and show it on the statement in the period issued

For broader background on invoicing, records, and payment administration, see AccountingWEB.