If the Worker refuses, you can write a letter to her Supervisor stating that you were denied of the Worker's Qualifications.
Everyone has the Right to question the Worker's Qualifications on the Job.
Just as you would to ask Doctor's Qualifications and where they get their Schooling.
Everyone has that RIGHT to know.
You would be surprised that most Workers are underquaified, and not even Schooled properly or even without an Education.
CPS Psch. Doctors, CPS Therapists, you can also ask of their Qualifications. I found out one Therapist was not even Licensed, and she had no Schooling whatsoever. Would that be dangerous of this so called Therapist counselling your small Child?
