Not sure mate! At least in my experience I got all. I remember I received my medical request by Email, then the second request for exam by mail to my home address. Bare in mind that I had a lawyer assigned to my case, so they had to email him, or send him the mail instead of emailing me and sending the mail to my house address. I guess you never know.
Stay for more replies.
Also remember changing address on ECAS takes a while. Give it at least 2 weeks till it gets updated on their system.