Holvi's invoicing tool has following invoice statuses:
You have saved an invoice but you haven't sent it forward. You can either Send the invoice or Mark it as sent. Both of these options will update the corresponding income category, but only actual sending will deliver it forward. You can also modify or delete an invoice that is in draft status.
Invoice has been sent forward or marked as sent. When the invoice is paid, Holvi will automatically match the arriving payment with the invoice based on the reference number. If a corresponding payment arrives without a reference number you can still manually mark the invoice as paid.
Invoices that have been matched to a payment with the corresponding reference are automatically marked as paid.
If the invoice has not been paid within the due date, the invoice will have an Overdue status. You can either modify the due date and send the invoice again, or delete the existing invoice and create and send a totally new one. You can't change the invoiced amount in already sent invoices, so if you want to include a notification fee you will have to create a new invoice.
This is for invoices that you have credited. Here you can read more about credit notes.
This status is for deleted invoices.