Get there: More > Tools > Catalog > Batch item deletion
This tool will allow you to delete a batch of item records from Koha.
From the tool you can choose to upload a file of barcodes or item ids, or you can scan items one by one into the box below the upload tool. Once you have your file uploaded or the barcodes listed you can click 'Continue.'
You will be presented with a confirmation screen. From here you can uncheck the items you don't want to delete before clicking 'Go.' If the items are checked out you will be presented with an error after clicking 'Go' and the items will not be deleted.
If the items can be deleted they will be and you will be presented with a confirmation of your deletion.