There are following invoice statuses:
|Draft||This status means that this is a draft invoice. Its amount is not taken into account in reports.|
|Sent||The invoice is sent to the client, and we are waiting for payment.|
|Paid||This status means that we have got the payment from the client!|
|No Charge||This status means that we don’t need to charge the client. That can be in the case when the total invoiced amount is zero or the total amount due is negative. The total amount due could be negative if the invoice items do not entirely consume the retainer. Read the Retainers and Upfront Payments article for more details.|
You can change invoice statuses manually in the view or edit invoice mode.