Tribunal letter

I got a letter from the tribunal service today.

I have to sign and give details of my GP. The letter says to get a medical report but the bit I have to sign says , obtain further medical evidence.

I was told I would have a Doc coming to me to do a medical. So why am I being asked to sign this, do I need to give formal consent for this Doc to come out?

The form I am asked to sign just says : Ref- authorisation to obtain further medical evidence.

I have also not got the notice of adjournment that I believe I should have got. When should I get it?