What do I do if an item does not have a unique identifier?

You can still download SCIS records for items that do not have an ISBN, ISSN or ISMN.

Depending on the type of item you have, there are a couple of options:

For video and sound recordings, you can search for titles and select your item directly from the Quick scan page. For more information, please see How do I download records using 'Quick scan'?
Alternatively, you can search for and download records within the SCIS catalogue, available from the Search page. For more information, please see How do I download records from the SCIS catalogue?