Terms of use

1. Publisher and version

The facturx service (the “Service”) is published by the person or company named below. “We” and “facturx” mean that person or company.

Publisher and publication director: Ibird, a private individual, on a non-professional, free-of-charge basis. Contact: hello@ibird.dev.

Site host: Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany, +49 9831 505-0. Account data is hosted by Supabase, described in the privacy policy.

These terms carry version number 2026-11 and apply from 8 November 2026. By creating an account, you accept this version: its number is recorded with your account, together with the date you accepted it.

The Service's code is public, in facturx's GitHub repository. The supabase/ folder (schema, access rules, issuing and reminder functions) is published under the AGPL-3.0-or-later licence, the rest of the repository under the MIT licence.

2. What these terms cover

With an account, the Studio keeps your drafts, your company, your customers, your catalogue and your numbering on a server. It issues your invoices, tracks the payments you enter, shows a dashboard and lets you send reminders to your customers.

Without an account none of this exists: the Studio keeps everything in your browser, and the online validator reads your file in your browser. Neither sends what you type or drop to any server, and these terms do not apply to them. The only signal that leaves is a content-free count, described in the privacy policy.

3. Your account

• The Service is meant for professionals: very small businesses and self-employed people who issue invoices.
• You create the account with an e-mail address and a password, and you accept these terms. A confirmation e-mail is sent to you.
• Until the account's address is confirmed, you can neither issue an invoice nor send a reminder.
• One account means one company and one user: this version supports neither several users nor several companies on the same account.
• Keep your password to yourself. Whatever is done from your account is done in your name.

4. Price

The Service is free at launch, and no payment method is asked of you. A subscription may be offered later. It is not part of these terms.

5. What the Service does, and what it does not

• It issues your invoices in the Factur-X format, EN 16931 profile: the server assigns the number, in sequence; the invoice is checked with the facturx-sdk SDK; the PDF is produced and frozen.
• An issued invoice is neither edited nor deleted while the account exists, by you or by us. To correct a mistake, you issue a credit note. The only exception is the purge of a deleted account (section 9).
• It works out the payment status (paid, partly paid, overdue…) from the payments you enter. It does not connect to your bank.
• It does not send your invoices to an accredited platform: this version is not connected to one.
• It is not legal, tax or accounting advice. You remain responsible for the content of your invoices (your statements, your VAT rates, your customers' details) and for their compliance.

6. Keeping your invoices

The law requires you to keep your invoices for ten years. That obligation is yours, not facturx's.

The Service keeps your invoices for as long as your account exists; when the account is deleted, they are erased (section 9). “Export my data” gives you a zip archive with a portable JSON file and all your PDFs: keep them, for the legal period, on a medium you control.

The Service is free and comes with no commitment on availability. Export your data regularly, without waiting for the account to be deleted.

7. Reminders

A reminder never goes out on its own. “Send a reminder” is offered on an invoice whose due date has passed and which still has an amount to pay. It prepares an e-mail that you read, edit, then send: nothing is sent without that step, and the Service sends no automatic reminders.

• The e-mail is addressed to your customer's contact address on the invoice, which you can change. The invoice PDF is attached.
• It is sent from “Your company name via facturx”, on facturx's domain. Your account address is set as the reply address (Reply-To): your customer's replies reach you directly.
• The suggested text depends on how many reminders have already been sent for that invoice: a friendly reminder, a firm reminder, then a last reminder that cites the late-payment penalties and the €40 fixed recovery fee written on the invoice.
• The Studio shows “sent”, never “received”: our sending provider accepted the e-mail, and nothing guarantees it was read.

The content of the reminder is yours, and it is up to you to make sure you may contact that customer. Do not use reminders for anything other than collecting your own invoices.

8. Usage limits

To send a reminder, the account's address must be confirmed and the seller's SIREN number filled in. Past a limit, the Service refuses the operation and tells you when to try again. An uploaded file's type is checked from its content, not from its extension. These limits protect the Service and the deliverability of e-mails; they may change.

9. Deleting your account

1. You export first. The Studio takes you through “Export my data” and reminds you that keeping your invoices for ten years is a legal obligation that rests on you.
2. You request deletion. From then on, the Service refuses to issue invoices or send reminders. Each time you sign in, the Studio offers only the export, “Cancel the deletion” and “Sign out”.
3. After 30 days, at the first nightly run that follows, everything is erased, in this order: the PDFs and files, your sign-in identity, your company's data (invoices, customers, catalogue, payments, reminders), then the traces of your sign-ins kept by the authentication server. This cannot be undone.

During those 30 days you can cancel the deletion and get your account back as it was. What happens to backup copies and to the host's technical logs is described in the privacy policy.

10. Personal data

The privacy policy says which data we process, why, where it is hosted and how long it stays. It is hosted by Supabase, a US company, in the eu-central-1 region (Frankfurt, Germany): the policy explains what that means.

The data processing agreement is part of these terms. For your customers' data, you are the controller and facturx is your processor (article 28 of the GDPR). By accepting these terms, you accept that agreement.

11. Changes to these terms

These terms may change. Each version has a number, shown at the top of this page; the number of the version you accepted is recorded with your account.