Free Template

Demand Letter Template for Unpaid Invoice

A demand letter for an unpaid invoice formally requests payment from a client or customer who has not paid for goods delivered or services rendered. This template is a general starting point for individuals and small businesses. You are responsible for filling in accurate details specific to your situation and verifying the information is correct before sending.

Disclaimer: This is a general-purpose template for informational purposes only. It is not legal advice and does not create an attorney-client relationship. You are responsible for ensuring the content is accurate and appropriate for your situation.

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Your Full Name

Your legal name or the legal name of your business.

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demand-letter-unpaid-invoice.docx

[Your Full Name] [Your Street Address] [Your City, State, ZIP] [Your Phone Number] [Your Email] June 14, 2026 [Recipient Name] [Recipient Street Address] [Recipient City, State, ZIP] RE: Demand for Payment — Invoice #[Invoice Number] — Amount Due: $[Amount Due] Dear [Recipient Name], This letter is a formal demand for payment of $[Amount Due], which remains outstanding on Invoice #[Invoice Number] dated [Invoice Date]. The invoice was for [Service Description] and was due on [Payment Due Date]. Despite [Prior Request Count] prior payment request(s), payment has not been received. Please remit payment of $[Amount Due] no later than June 28, 2026 to: [Your Full Name] [Your Street Address], [Your City, State, ZIP] If payment is not received by June 28, 2026, I intend to pursue all available legal options to collect the amount owed, which may include filing a claim in Texas Justice Court (small claims court). I prefer to resolve this without further action. You may contact me at [Your Phone Number] or [Your Email]. Sincerely, [Your Full Name] June 14, 2026

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When to Use This Template

A client or customer has not paid an invoice by the agreed due date
Prior informal payment reminders (emails, phone calls) have not resulted in payment
You want to formally document the unpaid debt before taking legal action
The invoice amount falls within the Texas small claims court limit of $20,000

After You Send the Letter

1Send the letter via certified mail with return receipt requested — this creates a paper trail proving delivery.
2Keep copies of the invoice, any contract or agreement, and all prior communications about the payment.
3If payment is not received by the deadline, you may file a claim in Texas Justice Court for amounts up to $20,000.
4Flash Justice can help you prepare your small claims court filing if your demand letter is ignored.

If Your Demand Letter Is Ignored

Flash Justice helps you prepare your Texas small claims court filing — the petition, defendant information, and supporting documentation — so you can file with your local Justice Court.

Start Your Court Filing

Frequently Asked Questions

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