Send the goods with a clear list of what is in the box — without showing prices.
Open an invoice or quote and choose More → Create delivery note. The items and quantities are copied, prices are hidden, and the note gets its own number (DN2026-001) with the delivery date and the address it goes to. Want prices on it after all? Switch on Show prices.
There is no account and no server behind this invoice generator. Your business details, clients, products and invoices are stored in your browser's own database (IndexedDB) and never uploaded. The PDF is built on your device. The only request the app ever makes on its own is optional: if you click Use ECB rate on a foreign-currency invoice, it asks the European Central Bank for that day's reference rate — sending just the two currency codes and the date. That also means nobody else has a copy — download a backup from Settings → Backup now and then, and keep it with your accounting files. Nothing is locked in: every PDF carries its own data, the backup format is documented, and you can download an offline copy of the whole app.
They are used interchangeably: both list the goods in a shipment without being a request for payment.
It is good practice. They have a separate series here, so they never affect your invoice numbering.