Normally, no. While it is true that it is legal for an employer to request certification if requesting a disability accommodation, he cannot ask for copies of your medical records or ask for details about your disability. The same is true if you are a job seeker. It is considered discrimination f they questioning the extent, severity, or nature of your disability, as well as asking you to take any tests or examinations that the employer does not impose on other applicants without such a disability.