I only ever hired one who admitted to having a sort of supervision out of the 4 I saw more than one time - and that one said it was intermittent if she thought she needed it. But I always hired those who were in their 60s-70s -so they generally thought they did not need it. Frankly I don't think, from when I have cases against them, that it helps them in any good way for the client. It might make the therapist feel better about themselves but certainly not the client. Adding in a third party's meddling who does not know one of the parties is a really super bad plan in my opinion.