DocFind-Requester compares the following fields in the original request and the new request:
Monographs
• Title
• Author
• Page Numbers
Serials
• Title
• Article Title
• Article Author
• Volume/Issue (normalised)
• Page Numbers
...
If the new request is flagged as a duplicate it will not be auto-mediated; rather it will go to Idle / Check Manual with a message in the Log Messages about the possible duplication: