You need to get an “Income and Asset Certificate” from the concerned government authority (Eg: Tehsildar).

The benefit of reservation under EWS can be availed upon production of an Income and Asset Certificate issued by a Competent Authority.

The Income and Asset Certificate issued ‘by any one of the following authorities in the prescribed format shall only be accepted as proof of candidate’s claim as ‘belonging to EWS.

• District Magistrate/Additional District Magistrate/ Collector/ Deputy Commissioner/Additional’ Deputy Commissioner/ 1st Class Stipendary  Magistrate/ Sub-Divisional Magistrate/ Taluka Magistrate! Executive Magistrate/ Extra Assistant Commissioner
• Chief Presidency Magistrate/Additional Chief Presidency Magistrate/ Presidency Magistrate
• Revenue Officer not below the rank of Tehsildar
• Sub-Divisional Officer or the area where the candidate and/or his family
  normally resides

The Officer who issues the certificate would do the same after carefully verifying all relevant documents following due process as prescribed by the respective State/UT.

Instructions referred to above should be strictly followed so that it may not be possible for an unscrupulous person to secure employment on the basis of a false claim and if any person gets an appointment on the basis of such false claim, her/his services shall be terminated  invoking the conditions contained in the offer of appointment.