If you do any kind of work where you come into contact with children you are required to complete a Criminal Records Bureau disclosure application form or to give it its more common name a CRB check. This form is submitted by the organisation that wants you to do the work i.e. a School, Church etc.
If you were to design a system with the aim of making it the most bureaucratic and idiotic system ever created then you could do worse that create a system like the CRB …