You are exactly correct ... there is no historic body of work (referenced and validated) that can be taught and learned to become a qualified coach or mentor as there is to become a lawyer or a doctor. And most of the `coaching accreditations` I have been exposed to are nothing short of revenue generating processes for the accreditors with little or no significantly positive consequences for the end-users, those being the clients of their pupils.
I dissuade people from paying to become `accredited` as a coach.
If you were an IT entrepreneur and Bill Gates (who never finished college) offered to mentor you, would you refuse his guidance because he wasn`t accredited? At the same time, I cannot operate my cell phone adequately, but I do know, that with my level of intelligence, I could do a `coaching accreditation` course and pass one of their nebbish exams. You would not want me telling you zip about technology. You see my point?
If you are considering offering your services as a mentor or a coach, call upon your skills, knowledge and expertise, offer your best advice, focus on achieving results and outcomes for your clients, and remember the doctor`s creed: "First, do no harm."
Best of luck.
Executive Wisdom Consulting Group
Founder of the Society for Executive Wisdom
Strategy for Professionals: www.strategyforprofessionals.com