RTI to Get Tenant Details based on a rent agreement

My wife has filled many false cases (498a, domestic violence, maintenance, Divorce) against me. My wife living with her parents but she showing in the case document that she is living separately in a rented house and given a rent agreement (fake rent agreement by manipulating with the relative) to extort the money on the name of maintenance. My question is that the home owner kept many tenants and enjoying the benefits of rent from those people. Someone has guided me to file RTI for the information regarding background check documents of the tenants which will be helpful in her ongoing litigation. Please guide me how to file the RTI online, which department to seek information of the tenant background verification from and what information to seek exactly and how to state the entire scenario in the RTI. Please help as we have never filed an RTI before this. Thanks in advance !!!! Please guide me how to file the RTI online, which department to seek information from and what information to seek exactly and how to state the entire scenario in the RTI. Please help as we have never filed an RTI before this. Thanks in advance !!!!