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NowOS seals every fiscal document — sales receipts, close-of-day reports, refunds, invoices — the moment it is created: each document is numbered without gaps and linked to the previous one, so any later alteration or deletion becomes detectable. You don’t have to do anything for this sealing to work; the Settings → Compliance page in the backoffice lets you verify it and produce the proof. In France, the anti-VAT-fraud law adds one more requirement: every document is also electronically signed by the main register. The sections marked “France” below only appear if your store is configured in France.

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Check the integrity of your registers

The Register integrity table reviews every register of the store: sales receipts, daily closures, monthly and annual closures, refunds and the event journal. The check runs automatically when the page opens; tap Verify now to run it again. For each register you see the number of archived documents and an Intact (green) or Broken (red) badge.
A Broken badge means a document was altered or deleted, or a number is missing from the sequence. This does not happen in normal use — contact NowOS support right away, especially before a fiscal deadline.

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Download the fiscal archive

The Fiscal archive card produces a complete file containing every sealed document of the store, in an open, documented format that an auditor can verify without NowOS. Tap Download archive (JSON) and keep the file. This is the export you hand to your accountant or to the tax administration during an audit.

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France: the electronic signature

When a main register is designated for a French store, it automatically creates a security key protected by the iPad’s hardware and registers it with the cloud. Every receipt, closure and refund is then signed with that key. What you see day to day:
  • Every printed receipt carries a signature extract and the conformity mention (“Logiciel conforme à la loi anti-fraude TVA…”) with the attestation reference.
  • Every reprint carries DUPLICATA and its edition number (“Édition n°2”, “Édition n°3”…): each reprint is traced. See Receipts & printing.
  • The Signing keys card on the Compliance page lists the store’s keys. Old keys stay listed after an iPad change — they are still used to verify the documents signed back then.
If the register shows “Fiscal signing key unavailable” early in its life (right after the main register was designated), the security key is not ready yet. The register then refuses a few sensitive gestures — starting the day, pay-ins/pay-outs, voids — rather than recording them unsigned. Check that the iPad has internet access and try again a few moments later.

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France: the certificate of conformity

The Certificate of conformity card shows the publisher’s individual attestation (article 286, I-3° bis of the French tax code): it names the software, its version, its dated reference and your legal business name. Tap Print attestation to print it or save it as a PDF. Keep a copy: this is the document you present during a tax audit.
The name on the attestation is the legal business name configured in Settings → Receipts. Check that it is correct before printing.

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What about training mode?

Everything done in training mode stays in a separate practice environment: no practice receipt ever enters the real registers, and prints carry the FORMATION watermark. Your fiscal registers only contain real sales.