Dear Banerjee,
I am trying to produce a new methodology within legal framework which is cheaper, speedier and effective. Under section 2(f) of the RTI Act information from a private body can be accessed if it can be accessed by by a public authority. Since inspector is a public authority, and under the Act he has to ensure compliance of these functions, the easiest way is to make representation to him and then ask for information from him as to what steps he has taken to obtain the needful and seek copy of certificate from employer. Further steps can be taken under the Act for getting needful.