Select this option from the List Manager Actions drop-down box to check all lists and orders for all users in your library system for any other occurrences of the ISBNs in the selected list. See the Duplicate Check for more details.
To check for duplicate ISBNs:
1. Click the checkbox to select the list to be checked for duplicates.
2. Select the Dupe-Check Lists/Orders option from the List Manager Actions drop-down box.
3. Click .