service/dangerzone.md

@@ -72,6 +72,10 @@ files in the `dangerzone/processing` directory (see [issue
 directory can be flushed if no bot is currently running (see below to
 inspect status).
 
+Files should either be destroyed or moved back to the top level
+(parent of `dangerzone`) folder for re-processing, as they are *not*
+sanitized.
+
 ### Inspecting service status and logs
 
 The service is installed under `dangerzone-webdav-processor.service`,