Four pre-written escalation stages — gentle pre-due nudge through final notice with legal teeth. Tone shifts automatically; the invoice details, days overdue, and late-payment interest stay accurate.
01 — What you create
Pick the stage — the tone, subject line, body copy, and accent colour all adapt. Days overdue and interest calculate automatically from the invoice and letter dates.
19 May 2026
TO
Marcus Vance
Northwind Books Ltd. · 221B Baker Street, London NW1 6XE
Subject: Payment reminder — invoice INV-2026-0241
Hi Marcus,
I’m writing to follow up on invoice INV-2026-0241 for USD 4,800.00, which was due on 26 Apr 2026 and now appears to be 23 days overdue.
It’s possible this has crossed in the mail with your payment, or perhaps the invoice didn’t reach the right person. Could you confirm whether payment has been issued…
OUTSTANDING INVOICE
Kind regards,
Alex Hartwell
Managing Director · Sonchoy Studio Ltd.
Scanned invoices, multi-page batches, multi-currency stacks, and direct push into your accounting system. Free for 30 days, no card required.
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02 — How it works
Late payers respond to clear, consistent, calm escalation — not to silence followed by an angry phone call. Three reminders over six weeks recovers most overdue invoices without a single awkward conversation.
Friendly pre-due nudge, first reminder, second reminder, or final notice. The tag colour, subject line, and tone of the body all adapt automatically.
Number, dates, amount, currency. Days overdue and (optionally) late-payment interest compute as you type — no spreadsheet maths.
Generate a PDF for posting, a DOCX for last-minute edits, or copy the email subject and body straight into Gmail / Outlook.
03 — Built for AR teams
Friendly, first reminder, second reminder, final notice. Each with its own tone, subject line, body copy, and accent colour.
Letter date minus due date — calculated and shown in the invoice detail box and woven into the body copy.
Optional toggle. Prorated by days overdue at your chosen annual rate. Adds a line and total-due row to the invoice table.
On the final-notice stage, set the number of days for the new deadline. The exact deadline date is inserted into the body copy.
Copy buttons for both, so you can paste straight into Gmail or Outlook if you'd rather email than send a PDF.
Print-ready PDF with letterhead, stage tag, and signature block. Editable .docx if you want to soften the auto-generated language.
Bulk OCR, batch invoicing, multi-party e-signing, redaction, audit logs — pdfFiller picks up where Sonchoy ends. Free for 30 days, no credit card.
Run 100+ invoices, statements, or conversions in one go.
Turn paper invoices into searchable, exportable data.
Multi-party signatures with full audit trails.
Mask sensitive ledger lines before sending to auditors.
04 — Common questions
Friendly pre-due: 3–5 days before the due date. First reminder: 3–5 days after the due date. Second reminder: 14–21 days after due. Final notice: 30+ days after due. Consistency matters more than exact timing — pick a cadence and stick to it across customers.
It's a formal pre-action letter, not a court order — but it satisfies the "letter before action" step that most jurisdictions require before legal proceedings. If you do end up in court, having this paper trail (especially the final notice with a clear deadline) materially strengthens your position.
In most jurisdictions, yes — either at the statutory rate or at the rate set out in your contract / invoice terms. The UK allows 8% over base; the US varies by state; the EU has the Late Payment Directive. Always check local rules. The tool calculates prorated interest at whatever rate you set.
Reminder letters about a debt you're legitimately owed are covered by "legitimate interest" under GDPR. Don't share the debt details with third parties (other than your debt-recovery agent or lawyer) — that can be a violation. The tool generates the letter locally; nothing is uploaded.
Email is fine for stages 1–2; final notice should go by both email and recorded/tracked post so you have proof of receipt. The tool lets you pick delivery method and copy the subject + body straight to your inbox.
PDF (one-page letter with letterhead, stage tag, invoice detail box, signature block, and footer) and .docx (fully editable). The PDF's accent colour reflects the stage — green for friendly, amber for first/second reminder, red for final notice.
05 — Related tools