Can your referees reveal personal information about you?

A referee will comment on your suitability for the role you have applied for. What is so personal that you would need to hide?

It depends on the issue if it is work or something else. it is also depend on the nature and sensitivity of the type of work. Then comes if they know each other.

Stu's right - it depends what you're trying to hide. Referees can't say anything bad about you if they can't substantiate it.