Any way to detect duplicate documents?

Yes, you can select "Show duplicates only" on the Files tab when defining the filter: How to find duplicate file content in a vault

Thanks Joonas Linkola !!

Hello Joonas Linkola - as a follow-up to this: is there a way to prevent users from creating duplicate files on the system?
I know a window pops-up  that informs users to the fact that a duplicate exists - but despite this some users are repeatedly uploading the same documents.

There's no built-in configuration option for this. Keep in mind that there can be legitimate reasons to upload the same file into the vault multiple times: these documents may have different metadata, workflow and permissions. Duplicate detection only checks the file contents and gives a warning about the existing duplicate files. The decision whether to create the document ultimately lies with the user.

If you can identify the document uniqueness by its metadata (for instance, there's a unique identifier such as invoice number or some combination of property values that has to be unique) then you can use the Unique Object Enforcement module of Compliance Kit to prevent the creation of metadata duplicates.

Good morning Joonas Linkola - thanks for this.
I realised this as I reviewed the duplicates that in a lot of cases the same document was uploaded for different reasons or by different users for specific uses as you outlined above: for example to request a duty trip the user must attach 'supporting documents'. In most cases, the duplicates were supporting documents for duty trip requests created by different users for the same event/purpose, so I realise now that blocking users from uploading duplicates would not work in this case.
Unique Object Enforcement is a very useful module that we utilise a lot to stop users creating Requests with the same details

Good morning Joonas Linkola - thanks for this.
I realised this as I reviewed the duplicates that in a lot of cases the same document was uploaded for different reasons or by different users for specific uses as you outlined above: for example to request a duty trip the user must attach 'supporting documents'. In most cases, the duplicates were supporting documents for duty trip requests created by different users for the same event/purpose, so I realise now that blocking users from uploading duplicates would not work in this case.
Unique Object Enforcement is a very useful module that we utilise a lot to stop users creating Requests with the same details