Template · Letter

Three-level dunning letter series — escalating from polite to firm to final

A complete dunning letter series gives you a consistent, documented escalation path from the first polite reminder through to a final demand before collections or legal action. Using all three in sequence demonstrates good-faith collection effort, which matters if you later need to charge off the debt or take legal action.

Use it for

  • Service businesses with net-30 or net-60 payment terms needing a systematic collection sequence.
  • Businesses that want pre-written, consistent language rather than drafting collection letters from scratch each time.
  • Any business that may eventually need to document its collection efforts for tax write-off or legal purposes.
  • Teams where multiple people handle AR and need consistent tone across all collection communications.

Do not use for

  • Active invoice disputes — resolve the dispute first before dunning.
  • Customers who have already been referred to a collections agency.

Variables to fill in

YOUR_BUSINESS_NAME
Your legal business name
YOUR_NAME
Your name or the name of the person signing the letter
YOUR_PHONE
Direct phone number for payment inquiries
YOUR_EMAIL
Email address for payment inquiries
CLIENT_NAME
Customer or client name
CLIENT_COMPANY
Customer company name, if applicable
INVOICE_NUMBER
The specific invoice number being collected
INVOICE_AMOUNT
Total outstanding balance on this invoice
ORIGINAL_DUE_DATE
The original due date stated on the invoice
LATE_FEE_RATE
Your contractual late fee rate (e.g. 1.5% per month)
PAYMENT_LINK
URL or instructions for online payment
FINAL_DEADLINE
The date by which payment must be received in the final letter

The template

Select all and copy. Replace the {{double-brace}} placeholders with your details.

This template is general-purpose educational content, not legal advice. State law varies and attorney review is recommended before use. Syntharra is not your attorney.

--- LETTER 1 (Day 3–7 past due) — Soft reminder ---

[Date]

{{CLIENT_NAME}}
{{CLIENT_COMPANY}}

Re: Invoice #{{INVOICE_NUMBER}} — Friendly Reminder

Dear {{CLIENT_NAME}},

I hope this note finds you well. I wanted to reach out regarding Invoice #{{INVOICE_NUMBER}} for {{INVOICE_AMOUNT}}, which was due on {{ORIGINAL_DUE_DATE}}.

If payment has already been sent, please disregard this message — and thank you. If not, I'd appreciate it if you could arrange payment at your earliest convenience. You can pay online at:

{{PAYMENT_LINK}}

If you have any questions about the invoice or would like to discuss payment options, please don't hesitate to reach out.

Thank you for your continued business.

Sincerely,
{{YOUR_NAME}}
{{YOUR_BUSINESS_NAME}}
{{YOUR_PHONE}}
{{YOUR_EMAIL}}


--- LETTER 2 (Day 14–21 past due) — Firmer notice with late-fee notification ---

[Date]

{{CLIENT_NAME}}
{{CLIENT_COMPANY}}

Re: Invoice #{{INVOICE_NUMBER}} — Second Notice / Late Fee Notice

Dear {{CLIENT_NAME}},

This is a second notice regarding Invoice #{{INVOICE_NUMBER}} for {{INVOICE_AMOUNT}}, which was originally due on {{ORIGINAL_DUE_DATE}} and remains unpaid.

Per our agreement, a late fee of {{LATE_FEE_RATE}} per month applies to balances past due. This fee will be added to your balance if payment is not received within 10 days of this notice.

To avoid additional charges, please remit payment via:

{{PAYMENT_LINK}}

If there is an issue with the invoice or a reason payment has been delayed, please contact me directly so we can address it promptly. I am glad to work out a solution, but need to hear from you within the next 10 days.

Sincerely,
{{YOUR_NAME}}
{{YOUR_BUSINESS_NAME}}
{{YOUR_PHONE}}
{{YOUR_EMAIL}}


--- LETTER 3 (Day 30–45 past due) — Final demand before escalation ---

[Date]

{{CLIENT_NAME}}
{{CLIENT_COMPANY}}

Re: Invoice #{{INVOICE_NUMBER}} — FINAL NOTICE — Demand for Payment

Dear {{CLIENT_NAME}},

This is a final notice regarding the outstanding balance on Invoice #{{INVOICE_NUMBER}}. Despite previous communications dated [Letter 1 date] and [Letter 2 date], the balance of {{INVOICE_AMOUNT}}, plus applicable late fees, remains unpaid.

DEMAND IS HEREBY MADE for full payment of all amounts owed no later than {{FINAL_DEADLINE}}.

If payment is not received by {{FINAL_DEADLINE}}, we will proceed with one or more of the following without further notice:

- Referral of this account to a collections agency
- Filing in small claims court or civil court for the balance owed, plus court costs
- Reporting the delinquency to applicable commercial credit bureaus

To avoid these actions, please remit payment immediately at:

{{PAYMENT_LINK}}

If you believe this notice has been sent in error, contact us immediately at {{YOUR_PHONE}} or {{YOUR_EMAIL}}.

Sincerely,
{{YOUR_NAME}}
{{YOUR_BUSINESS_NAME}}
{{YOUR_PHONE}}
{{YOUR_EMAIL}}

---

This template is general-purpose educational content, not legal advice. State law varies and attorney review is recommended before use. Syntharra is not your attorney.

Consistent follow-up is the single biggest factor in recovering overdue invoices. Syntharra automates the calls so the sequence actually happens.

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