How to write a letter of demand

To write a letter of demand, set out what is owed invoice by invoice with dates and days overdue, say what the money is for, list the reminders already sent, demand payment of a stated amount by a fixed calendar date, and say plainly what you will do if it is not paid, naming the court or tribunal. Sign it as the business, keep it factual, and send it only after ordinary reminders have failed.

When to send one

A letter of demand is the last step before legal action, not the first reminder. Victoria Legal Aid describes it the way debtors experience it: creditors usually, though not always, send a letter of demand, also called a final notice, before taking further action, and it asks for payment and says the creditor will sue if the debt is not paid.

Send it when the debt is overdue, ordinary reminders have been ignored, and you are genuinely prepared to take the next step. A letter that threatens a claim you never file teaches the debtor to ignore your letters.

Before it, most businesses send a statement of account and at least one reminder. The overdue payment notice example, for a fictional plumbing business owed $4,763 across three invoices, is the kind of final notice that comes first: interest shown, contact history listed, and four options for resolving it. The letter of demand follows if that notice is also ignored.

Gather the evidence before you write a word. Pull the accepted quote or signed contract, every invoice, any delivery docket or sign off sheet, and the emails, texts and call notes that show the debtor knew the money was owed. Check the exact legal name of the entity you contracted with, which may differ from the name on its shopfront or email signature. Everything the letter states should be something you could hand to a registrar the same afternoon, because if the debt goes to court the letter becomes the first page of that bundle.

The facts: debt, work and history

The strength of the letter of demand example is that it is specific. A fictional landscaping business is owed $6,840 by a fitout company, and the letter proves it in three numbered sections.

The debt. A table lists two invoices with issue date, due date, amount and days overdue: INV-2231 for $4,290 at 72 days, and INV-2258 for $2,550 at 51 days. An amount can be argued about; the number of days since it fell due cannot.

The work. One sentence ties the invoices to the works at a named site, the quote accepted on 28 May 2026 and a sign off sheet dated 10 June 2026. That is the evidence that the work was agreed and delivered.

The history. A dated list shows a statement on 1 August, a reminder on 15 August, a phone call on 29 August in which the debtor promised to pay by 5 September, and a final notice on 8 September. It proves this is not the first contact and puts the broken promise on the record.

The demand and the deadline

State the amount, the deadline and where to pay. The example says: pay $6,840.00 within 14 days of the date of this letter, that is by 6 October 2026, to the account below. Writing both the period and the date removes any argument about when the clock started.

Offer one way to resolve it other than full payment. The example invites the debtor to propose a written payment plan by 1 October, provided any plan clears the debt by 30 November. A court looks favourably on a creditor who offered a reasonable way out.

Put the payment details in the letter, with a reference to quote, so paying is easier than ignoring it.

What happens next

Name the forum and what will be claimed, rather than threatening “legal action”. The example says it will file a claim in the Small Claims Division of the NSW Local Court for the amount owed plus interest and the filing fee, and adds a callout that a judgment may be recorded against the company and affect its credit record.

The NSW Local Court’s civil jurisdiction page says its Small Claims Division hears claims up to $20,000, with less formal proceedings, and its General Division hears claims above that up to $100,000. Other states use different courts and tribunals with their own limits and fees, so check the forum’s current page before naming it.

Interest and costs need a basis. The example cites 8% a year under the quote terms, calculated at $96.22 to the date of the letter, and the court filing fee for a company claim. The late payment interest clause explains why that entitlement needs to be in the agreement before the debt arises.

Tone and what the law rules out

Firm is fine. Misleading, harassing or intimidating is not. The ACCC and ASIC guideline on debt collection sets out conduct creditors and collectors should avoid, and it applies to a business collecting its own debts as well as to agencies.

Three rules keep a letter on the right side:

• Do not dress it up as a court document. Victoria Legal Aid warns that some creditors send letters that look like court documents to make people think proceedings have started, and that this is illegal.
• Do not claim amounts you are not owed. Only interest and costs you are entitled to, with their basis.
• Do not threaten what you will not do or cannot do. Name only the step you will actually take.

Write it openly. The example includes a short callout saying it is not marked without prejudice, because a letter of demand is meant to be shown to the court if a claim is filed.

The paragraph table

The table at the end of this article lists the twelve parts of a letter of demand, what each says, and how the Ridgeline Landscapes example handles it. The note on what a letter of demand is covers the definition and the legal effect in more general terms.

Common mistakes

No days overdue. A list of invoice numbers without dates makes the reader do the arithmetic, and hides how old the debt is.

A vague threat. “Further action will be taken” tells the debtor nothing. Name the court.

A deadline as a period only. “Within 14 days” of what? Write the date.

Addressing the wrong entity. Demand payment from the company that contracted with you, not its trading name or a staff member.

Adding penalties you cannot justify. It weakens a good claim and can breach the debt collection rules.

Sending it before checking the invoice. If the debtor has a reasonable complaint about the work, answer it first. A statement of account sent earlier often surfaces those disputes while they are still small. The guide on common contract clauses explained covers the payment and dispute clauses that decide much of what a letter of demand can say.

Build it

A letter of demand speaks for a sender, so a document here uses a letterhead for it, in one of four styles: masthead, ledger, monogram or underline. A cover page is never added to a letter. Callouts come in four variants, info, warning, success and danger, which suits the short notes on openness and consequences, and tables carry the debt and the contact history.

Documents do not print citations, so the court and the rules you rely on are written into the letter as text. The AI chat edits text only, which is useful for adjusting tone or tightening a paragraph without touching the tables. The page on letterheads shows the four styles, and the tutorial on creating a document with AI covers drafting the letter from a prompt that lists the invoices and dates.