If your organization practices
open-item accounting and your credit and collections rules revolve around
collecting on unpaid bills, you can set up the system to automatically write-off bills.
If you've enabled this functionality,
Bill - Main will contain a button that a user can click to manually write off a bill. A corresponding button exists that a user can click to reverse a written-off bill.
Refer to
Writing Off Bills for a description of how to set up the system to allow both automated and manual bill write off.