Hi, I want to call api to change ownership of file but I saw only editor and viewer option, suppose I assign someone as editor using api and then i delete file from my folder then it will delete from others account too.
Is there any other way to tackle this situation
Hi 
Welcome to Box community!
Only the current owner of a file/folder can transfer ownership of the content. If you’re the current owner, you can move the file to a folder that you wish to transfer the ownership to. Afterwards, please follow this developer guide on how to Change Folder Owner.
Same goes with file/folder ownership in your Box account. You can refer to this article about Transferring Folder Ownership.
Thanks and have a great day! 
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