Verified by Turtini — the QR stamp on every PDF

Every PDF Turtini issues — quotes, invoices, receipts, contracts, deck exports, runbook exports — carries a small "Verified by Turtini" QR code in the bottom-right corner of every page.

What it does:
• Each PDF is registered in our system at the moment it's generated, and a SHA-256 hash of the final file is stored alongside the issuer's org and a timestamp.
• Anyone who receives the PDF can scan the QR (or open the printed turtini.com/verify/<id> URL) to see who issued it, when, and the kind of document it is.
• The verify page also offers a drag-and-drop tamper check — drop the PDF you received and it's hashed locally in your browser. If the hash matches our record, you see "matches the issued document". If a single byte was modified after issuance, the hash will not match.

Why this matters:
• Procurement teams can confirm a quote actually came from your org, not a forged copy.
• Customers can verify an invoice they received in email is the one you sent, not a wire-fraud lookalike.
• Auditors can confirm receipts and contracts haven't been retouched after the fact.

The tamper check happens entirely in the recipient's browser — the file never uploads to Turtini. We only stored the hash at issuance, and we use it for comparison.

Revoking a PDF: org admins can revoke an issued PDF (e.g. an outdated quote that should not be honored). The verify page then shows "Revoked" with the reason and date. Revocation does not invalidate the hash — older copies still verify as authentic, just flagged as superseded.

If you don't see a QR on a Turtini-generated PDF, it predates this feature (PDFs older than 2026-04-28). New issuances always include the stamp.