If a request is submitted using an ISBN that is excluded from scanning, TADC automatically moves to the next available ISBN for this edition to determine if it is covered. If the alternative ISBN is covered, TADC approves the request without alerting us to the fact that the excluded ISBN was swapped for the one that is covered.
As information about the available ISBNs is pulled from our catalogue that includes all available ISBNs for the item (not just the ISBN of the copy that we store), we might find that we provide scans from the excluded items that we have in stock rather than from the alternative covered items.
We would like to see the information about the ISBN swap displayed at the requesting stage in order to comply with the terms of the CLA licence. A solution might be to highlight the excluded ISBNs in some way.
In the CLA review for each request, you can now see the outcome for each ISBN to see if it is covered by the licence and will only accept the request if one match is made.