Three escalating messages for an unpaid invoice, from the polite reminder to the formal notice, with the timing that keeps the relationship.
An unpaid invoice is almost never a refusal to pay. It is a mislaid document, an accounts team waiting on a purchase order, or a person who forgot. That is why the first message must stay light: a hard tone sent too early turns an oversight into a dispute.
So the escalation matters more than the words. A reminder, a follow-up, then a formal notice, each in its place, and you recover most of what you are owed without ever damaging the relationship.
When your client is a business, the law where you work may allow late payment interest from the day after the due date, and sometimes a fixed collection fee. Check the rules that apply to you before you mention them.
These terms must appear on your invoices and terms of sale. Citing them in a formal notice carries weight; inventing them carries none, and turns against you.
With a CONSUMER client, that regime does not apply: penalties must have been agreed in the contract. When in doubt, have your situation checked before putting a figure in writing.
Send dates, delivery receipts, replies. If it goes as far as a court order, that timeline is what makes the difference, and it is very hard to rebuild after the fact.
It is also why writing beats phoning. A call can be disputed, an email cannot.
Written with these trades in mind
Template 1 of 3
When to use it : It assumes an oversight, because that is almost always what it is.
Subject : Invoice [number] dated [date]
Hello [first name], A quick word about invoice [number], for [amount], due on [date]. As far as I can tell it is still outstanding. If it slipped past you, I am attaching it again; if payment has already gone out, please ignore this message. Best, [your first name]
Template 2 of 3
When to use it : The tone firms up, and above all you ask for a DATE. A follow-up with no date asked for gets an answer with no date.
Subject : Follow-up: invoice [number], [number] days overdue
Hello [first name], I am coming back about invoice [number] for [amount], now [number] days overdue and still unpaid. Could you confirm a payment date? If there is something to sort out about the work or the invoice itself, tell me and we will talk it through. Best, [your first name] [your phone]
Template 3 of 3
When to use it : As a last resort, after two unanswered follow-ups. Send it by certified mail: that is what gives it weight if things go further.
Subject : Formal notice to pay, invoice [number]
[Your name, address] [Recipient's name and address] [Place], [date] Subject: formal notice to pay Sent by certified mail To whom it may concern, Despite my reminders of [date 1] and [date 2], invoice [number] dated [date], for [amount], due on [due date], remains unpaid. I hereby give you formal notice to settle it within fifteen days of receiving this letter. Failing that, I reserve the right to take any step necessary to recover the debt. Sincerely, [Signature]
With Standin
Standin reads your clients' messages while you work, fills in their record and drafts the reply in your words. You read it over and send. Free to start, no card needed.