As can be seen from the screenshot below, there is a list of batch statuses "Valid", "Exception" and "Rejected". When status "Rejected" is selected the “Vendor is in the black list” is displayed in the comment field. Users want to know where and how can these values be set and modified.
For detailed instructions check wiki.
The “Vendor is in the black list” is the default reason provided in an invoice project. In order to modify the statuses user can open Document Definition Properties -> tab Document Definition Settings -> Handling Invoice Output Status -> Edit
The statuses can be set up according to users' needs. Basically this particular status "Vendor is in the black list" is not connected to any actual vendor. It is just a message\comment.