Is it possible to delete a file from the Turnitin database?

If the file has already been uploaded to the database, it is very difficult to remove it (in exceptional cases, you can ask this – only if you are a teacher at USI or SUPSI – by contacting eLab).
However, you can exclude the older versions of the same file from the similarity report.

See FAQ: How can I exclude a source from the Turnitin originality report?

(last update: 13.11.2019)