Enter your overdue B2B invoices. Duenote computes statutory interest period by period, adds the €40 statutory fee per invoice, and writes a ready-to-send formal demand letter — in seconds.
Three steps from an unpaid invoice to a defensible claim and a letter on the debtor's desk.
Amount, due date, and (optionally) the date it was finally paid. Add as many overdue invoices as you like, in any EU currency.
Statutory interest is computed half-year by half-year at the official ECB reference rate + 8 points, plus the €40 fee per invoice — instantly, as you type.
Download a professional PDF demand letter (EN/FR/DE) citing the directive and your country's law — ready to email or post to the debtor.
Everything runs in your browser session. We never store your invoice data.
Statutory rates use the official ECB reference rate per half-year (e.g. H1 2026: 2.15% + 8 = 10.15%). Confirm the exact rate for your period before sending.
The preview PDF carries a SPECIMEN watermark. The clean, ready-to-send PDF is delivered after payment.
Most online tools stop at a number. Duenote takes you all the way to a letter you can send.
A formal demand letter citing the directive and your country's transposition — ready to send today.
Interest is split half-year by half-year, each with its own ECB reference rate — not a flat rate that distorts your claim.
The statutory €40 fixed recovery fee is added automatically for every overdue invoice, per Article 6.
Generate the letter in English, French or German — built for chasing a debtor in another member state.
Pay per letter. Nothing to install, no monthly fee, no sign-up. Your data is processed ephemerally.
Runs on EU infrastructure (Hetzner, Germany). No tracking, no resale of your data.
Every overdue B2B invoice carries interest and a €40 fee you can legally claim. See your number, get your letter.
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