Demand Letter for an Unpaid Invoice

A formal demand letter is the step that separates clients who pay from clients you sue. It converts your unpaid invoice from an awkward email thread into a documented legal demand with a deadline, and it is usually the cheapest collection tool that actually works.

In most states you will also want this letter as evidence if you file in small claims court: it shows the debt, the demand, and the debtor's silence. Judges expect to see that you asked properly before filing.

Build yours in five minutes

Answer a short questionnaire and get the complete escalation set built around your facts: this letter polished and ready to send, plus a follow-up and a final notice for if they ignore you. $19.99, one time, no account.

Start my letter

Sample letter

This is the exact structure your finished letter will follow, with placeholders where your facts go.

[Your Full Name] [Your Street Address] [City, State ZIP] [Date] [Recipient's Full Name] [Recipient's Street Address] [City, State ZIP] RE: Formal Demand for Payment Dear [Recipient's Full Name]: This letter is a formal demand for payment of $[amount, e.g. 1,850.00], which you owe me for Invoice #[number] for [services or goods provided]. The relevant facts are straightforward. The work was delivered on [date] and accepted without objection. Invoice #[number] was issued the same day with payment due [date]. Reminders sent on [date] and [date] have gone unanswered. Demand is hereby made for payment in full of $[amount, e.g. 1,850.00] within 14 days of your receipt of this letter. Payment may be made as follows: Check mailed to the address above, or [electronic payment option]. If payment is not received by that deadline, I intend to pursue the remedies available to me, which may include filing a claim in court and seeking recovery of costs where permitted. A judgment can affect your credit and can be enforced against wages and bank accounts. None of that is necessary if you simply resolve this now. This letter is written without waiver of any rights or remedies, all of which are expressly reserved. Sincerely, [Your Full Name]

What to include

The invoice number, amount, and what the work or goods were
Delivery and acceptance facts: when you performed, when they accepted
The original due date and your collection attempts since
A payment deadline and exactly how to pay
What happens if they do not: court, costs, credit consequences

Common questions

How long should I give them to pay?

Ten to fourteen days from receipt is standard. Long enough to be reasonable in front of a judge, short enough to keep pressure on.

Do demand letters actually get invoices paid?

Frequently, yes. A formal letter signals that ignoring you now has a cost. Debtors who were stalling often pay once it is clear the next step is a court filing.

What if they dispute the quality of the work?

State the acceptance facts in your letter: they received the work, used it, and raised no timely objection. If there was a genuine dispute, the letter often surfaces it so you can settle or prepare for it.

New to this? What a cease and desist letter is, whether it is legally binding, and how to send it properly.