All the certificates should get attestation from the concerned state department to get embassy attestation. In Kerala It is known as Norkka Attestation . There are three Norkka centers in Kerala ( Trivandrum, Calicut and Cochin). Once in a month every collectrates provides Norkka attestation. Norkka will get only for government certificates. Other states it is known as the State authentication Department ( H.R.D). A certificate is authenticated only in issuing state education department after verifying the content of the specified certificate. Authentication is the truly an accurate representation of the authenticity of that specified certificate. The State Human Resource Department is attested all certificates issued by Govt. School, Govt. Technical Board, Medical & Paramedical Institution, university, etc. After completing the attestation process the certificate can proceed to the ministry of External Affairs & Embassy Attestation. You can do with the Mantralya attestation also to get MEA attestation.