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Past due invoice reminder letter template (friendly)

A polite reminder for a past due invoice. Use this before escalating to a firmer notice.

Published Jan 20, 2026

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How it works

Step 1

Fill out form

Complete the guided fields online.

Step 2

Preview PDF

Review the generated PDF before mailing.

Step 3

Mail

We print and mail it via USPS.

Copy/paste template

Use this template
[Your Company Name]
[Your Company Address]
[City, State ZIP]
[Phone]
[Email]

[Date]

[Recipient Name]
[Recipient Company]
[Recipient Address]
[City, State ZIP]

Re: Friendly reminder - Invoice #[Invoice Number]
Amount Due: $[Amount]
Original Due Date: [Date]

Hello [Recipient Name],

I hope you're well. This is a friendly reminder that invoice #[Invoice Number] for $[Amount] is past due.
If you've already sent payment, please disregard this notice. Otherwise, please remit payment by [New Due Date].

Payment options: [methods].
Payment instructions: [link or address].

Thank you,
[Your Name]
[Title]
[Company]

Before you mail (checklist)

  • Confirm the invoice number and amount.
  • Include an updated due date.
  • Add payment methods and contact info.

When to use Certified Mail

If you need proof the reminder was delivered, use Certified Mail with electronic return receipt (First Class only).

Certified Mail with electronic return receipt (First Class only)

Common mistakes to avoid

  • Vague amounts or missing invoice number.
  • No payment instructions.
  • Forgetting to include contact info.

What you get

  • • Friendly reminder template
  • • Certified Mail with electronic return receipt (First Class only)
  • • First Class or Express delivery options

Simple pricing

Base fee plus per-page printing. Postage included. See pricing for details.

Why PostalForm

USPS delivery

First Class or Express with optional Certified Mail.

Address validation

Reduce returned mail and delivery errors.

Fast checkout

Upload once and mail in minutes.

FAQs

Do you offer tracking?
Yes. Add Certified Mail with electronic return receipt (First Class only).
Can I include attachments?
Yes. Combine the letter and invoice into one PDF.

Ready to send it?

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Resources

Second notice overdue invoice letter templateFinal notice before legal action letter templateCertified Mail with electronic return receipt (First Class only)
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