Apostille

For the purpose of Apostillisation there are two processes, firstly all documents should be first authenticated by the designated agencies in the State from where the document has been issued. In case of personal documents such as like birth,  affidavits, marriage etc, the State Home Department/General Administration Department are the designated authorities. You need don't require authentication from Ministry of Home Affairs in New Delhi. Second process is Documents attested by this authority then need to be presented to MEA for issue of Apostilles. A fee of Rs. 50/- in form of Postal/Pay Order drawn in favour of PAO, MEA, New Delhi is payable for each Apostille sticker. 
The Registrar of Marriages only issues Original Marriage Certificate once & after that only a certified copy of the Original is issue so marked & stamped. You have to contact the State Home Department/General Administration Department, Mumbai & get this Certified Marriage Certificate Authenticated before presenting it for affixation of Apostille Stamp by the MEA in New Delhi. Visit the State Secretariat & contact the State Home Department there for the authentication.