The rules around transferring ownership of a Google Document to another user appear to have recently changed, so I'd like some clear answers around what is and isn't possible.
My testing indicates that:
- It is not possible to transfer ownership of a Google Document from one Gmail account to another.
- It is possible to transfer ownership of a Google Document from one Google Apps account to another in the same domain.
- It is not possible to transfer ownership of a Google Document from a non-Gmail Google account to a Gmail Google account.
- It is (sometimes) possible to transfer ownership of a Google Document from a Gmail Google Account to a non-Gmail Google Account (not a Google Apps account).
This last finding confuses me a lot and is the reason I suspect I don't understand what's going on here, thus prompting my question!
I strongly suggest users test their answers before replying to this question. A lot of the online documentation (both Google and third party) appears to be out of date, non-specific or inaccurate. That's another reason I'm asking here...
Note that I am asking about changing ownership using the web interface. I am aware there are workarounds, such as downloading and reuploading documents, making copies, using third-party tools like Migrator etc. These are all interesting, but not the focus of this question.