Update client invoice
From Protemos Wiki
Client Invoice update page: http://cloud.protemos.com/client-invoice/update?id=ХХХХ (replace XXXX with the valid project number)
On this page, you can update the detail of the invoice.
The availability of fields for editing depends on the status of the invoice.
If you the invoice has not yet been marked as sent, you can edit “Payment method”, “Due date” and “Note to client” fields.
For sent invoices, you can edit only “Notes to client”.