National Securities Depository Limited [nsdl] — Discrepancy in taking proof of Date of Birth

Address:

Alappuzha, Kerala, 689126

As per my little knowledge SSLC or Secondary School Leaving Certificate issuing by State Govt is equivalent to Matriculation Certificate. But recently when I submitted SSLC certificate of my Mother's PAN card Correction there raised the confusion that SSLC is not considering as Matriculation certificate. I am a keralite, we are getting 10th certificate which is given by state govt and the certificate is named as SSLC. If this is the case then why got not taking any action to rectify this Discrepancy, which is giving confusion to the verifying authorities. From their view of point SSLC is not a Valid document. What I understood is the verification authorities doesn't that person's born before e1989 SSLC can be taken as proof of Date of Birth.