Orders and invoices are different
An order records the commercial snapshot and setup lifecycle. An invoice is an issued accounting document. The dashboard does not claim that an invoice exists until the order has an invoice identifier and Salesdocs has issued the document.
Who can see an invoice
Invoices belong to one country-locked client account. The signed-in visitor must hold billing access for that exact client and use the corresponding Silurian country site. PDF access repeats those checks and does not accept an invoice secret from the browser.
Outstanding balance
Silurian compares the issued invoice total with recorded account movements. A payment action is offered only while the invoice is unpaid and a positive balance remains. Paid, cancelled, refunded or zero-balance documents cannot create a new payment link.
Pay by link
An invoice email may contain a long revocable Silurian payment reference. It opens a minimal invoice summary without requiring dashboard login, but does not expose line items, customer APIs or provider credentials. Continuing to the payment options still does not charge the card by itself.
Payment authority
A browser return page is not accounting evidence. Silurian records payment only after the configured payment application and its authenticated provider result have reconciled the invoice, amount and currency.