I bought Office 2013 which doesn't come with a DVD (you need to download it only after signing into your "Microsoft Account"). Sadly this doesn't always work as can been seen here: http://pastebin.com/GFWT1pC0 After a long battle with Mary from Microsoft our chat goes like this:
john: I think I will just download this software instead from a torrent site
john: at least that way I can get it
john: I can then just use that code if it asks for it
Mary: Obviously, I cannot comment on that.
Mary: Is there anything else I can assist you with today?
john: yes
Mary: Yes
john: Please ask Microsoft to keep DVDs with their products, or provide URLs to download the software
john: thanks