Account-level deduplication

[sumade123]

I am creating an app that will upload files to Mega, but I wonder if I need to handle the case where the user renames the file.

I read that Mega does account-level deduplication, is this still the case?

i.e. the user uploads a file, but then the file is renamed and is uploaded again (will this take double the space, or will it recognise the original file, and not take up additional disk space, whilst (in the user's view) the files of both names are still visible).