Demand letter for an unpaid invoice

It is free to fill in online, needs no account, and downloads as a Word document or a PDF. See all Money and payments templates

• Your name or business

  For example: Studio Marlow

• Your address and contact

  For example: 4 Canal Road, Amsterdam, hello@studiomarlow.example

• Customer

  For example: Vermeer Interiors BV

• Customer's address

  For example: 18 Keizersgracht, Amsterdam

• Invoice number

  For example: INV-2026-114

• Invoice date

  For example: 1 August 2026

• Original due date

  For example: 31 August 2026

• What the invoice is for

  For example: the brand identity design delivered on 28 July 2026

• Amount unpaid

  For example: EUR 4,800

• Earlier reminders

  For example: I sent reminders by email on 8 September and 22 September and called on 30 September.

• Interest or fees claimedoptional

  Only what the contract or the law allows.

  For example: Late interest of EUR 96 under clause 6 of our agreement

• Pay in full by

  For example: 30 October 2026

• How to pay

  For example: Bank transfer to IBAN NL00 BANK 0123 4567 89, reference INV-2026-114

• What you will do if it is not paid

  For example: I will pass the matter to a debt collection agency and start legal proceedings to recover the debt, interest and costs.

1. 1The debt
2. 2What I ask you to do
3. 3If you do not pay

1. 01

   Fill in

   Type your details in the form. The document fills itself in as you type; click any gap to jump to its field.

2. 02

   Check

   Read it through. Gaps you have not filled stay marked, so nothing goes out half done.

3. 03

   Download

   Save it as a Word document to edit further, or as a PDF to send or print.

What details does this template ask for?

The form asks for 14 details, starting with Your name or business, Your address and contact, Customer, Customer's address, Invoice number. 1 more are optional.

Can I download this template as Word or PDF?

Yes. When you have filled in the form, save it as a Word document to keep editing, or as a PDF to send or print. It is free and needs no account.

Is what I type sent anywhere?

No. What you type stays in your browser while you fill in the document. It only goes to nerix if you choose to open the template in the chat.

What should I check before I use this template?

Rules on interest, fees, debt collection and the steps before going to court differ by country, and some require a particular notice or wait. Only claim what the contract or the law lets you claim, and check local rules before you act on this letter.

Are these invoice and payment templates free?

Yes. Each one is free to fill in and download as Word or PDF, with no account.

What must an invoice include?

Your details, the customer's details, an invoice number and date, a description of what was sold, the amount and how to pay. Tax rules differ by country, so add what your local rules require.

How polite should a payment reminder be?

Start friendly and factual, with the invoice number, amount and due date. Only move to firmer wording if the first reminder is ignored.

Can I use these for a business in any country?

Yes. The templates assume no country, and you enter your own currency, tax details and payment instructions.

• Acknowledgement of debtA signed note in which a person or company admits owing a sum and says how and when it will be paid.Money and payments
• Bill of saleRecord a private sale of a car, phone or other item, with the price and condition.Money and payments
• PopularInvoiceBill a client clearly with items, tax, total, due date and how to pay.Money and payments
• Payment receiptConfirm money received, such as rent or a deposit, with the amount, date and method.Money and payments
• Payment reminderChase an overdue invoice politely, from a first reminder to a final notice.Money and payments
• Personal loan agreementPut a loan between friends or family in writing, with a clear repayment plan.Money and payments

See all Money and payments templates