In Version 18.3, a new Invoice Status was introduced - Complete & Write Off.

With this status a company can mark an Invoice as a Write Off meaning that while the work was completed, the customer is not paying the full amount. 

Here, the invoice amount for any Invoice with a status of Complete & Write Off, will not be included in the Revenue reports throughout the software.

The main goal of this status is to allow companies accurately show they do not intend to follow up on payment for work completed, without having to incorrectly change the status to Complete & Paid (as the full amount was not actually paid).