Handling duplicate files in FTP involves identifying which file is the original and which file is the duplicate. This can be done by comparing the file names, modified dates, and file sizes. Once this identification process is complete, the duplicate file can be deleted or renamed to avoid confusion. In some cases, it may also be necessary to consult with the user who uploaded the file to determine the intended version. The technical process involves using FTP software to view the files on the server and comparing their attributes to identify duplicates. This can be done manually or through the use of specialized software tools.